diff --git a/core/src/ast.rs b/core/src/ast.rs
index 9d590af5..1a9c22a7 100644
--- a/core/src/ast.rs
+++ b/core/src/ast.rs
@@ -509,7 +509,7 @@ pub(crate) fn evaluate<I: Interrupt>(
 		}
 		Expr::Equality(is_equals, a, b) => {
 			let lhs = evaluate(*a, scope.clone(), attrs, context, int)?;
-			let rhs = evaluate(*b, scope.clone(), attrs, context, int)?;
+			let rhs = evaluate(*b, scope, attrs, context, int)?;
 			Value::Bool(match lhs.compare(&rhs, int)? {
 				Some(cmp::Ordering::Equal) => is_equals,
 				Some(cmp::Ordering::Greater | cmp::Ordering::Less) | None => !is_equals,
diff --git a/core/src/date.rs b/core/src/date.rs
index 72676345..0aafc052 100644
--- a/core/src/date.rs
+++ b/core/src/date.rs
@@ -21,7 +21,7 @@ pub(crate) struct Date {
 }
 
 impl Date {
-	pub(crate) fn today(context: &mut crate::Context) -> FResult<Self> {
+	pub(crate) fn today(context: &crate::Context) -> FResult<Self> {
 		let Some(current_time_info) = &context.current_time else {
 			return Err(FendError::UnableToGetCurrentDate);
 		};
diff --git a/core/src/eval.rs b/core/src/eval.rs
index 80366835..7a97a5d1 100644
--- a/core/src/eval.rs
+++ b/core/src/eval.rs
@@ -16,7 +16,7 @@ pub(crate) fn evaluate_to_value<I: Interrupt>(
 	let mut missing_open_parens: i32 = 0;
 	for token in lex {
 		let token = token?;
-		if let lexer::Token::Symbol(lexer::Symbol::CloseParens) = token {
+		if matches!(token, lexer::Token::Symbol(lexer::Symbol::CloseParens)) {
 			missing_open_parens += 1;
 		}
 		tokens.push(token);
diff --git a/core/src/lexer.rs b/core/src/lexer.rs
index 884c1e99..b365b1d3 100644
--- a/core/src/lexer.rs
+++ b/core/src/lexer.rs
@@ -845,7 +845,7 @@ impl<'a, I: Interrupt> Iterator for Lexer<'a, '_, I> {
 			res,
 			Some(Ok(Token::Num(_) | Token::Symbol(Symbol::UnitConversion)))
 		);
-		if let Some(Ok(Token::Symbol(Symbol::Backslash))) = res {
+		if matches!(res, Some(Ok(Token::Symbol(Symbol::Backslash)))) {
 			self.after_backslash_state = 1;
 		} else if self.after_backslash_state == 1 {
 			if let Some(Ok(Token::Ident(_))) = res {
diff --git a/core/src/num/complex.rs b/core/src/num/complex.rs
index 8f666e4e..68462596 100644
--- a/core/src/num/complex.rs
+++ b/core/src/num/complex.rs
@@ -144,7 +144,7 @@ impl Complex {
 			let rem = rhs.clone().real.modulo(4.into(), int);
 			// Reduced case: (ix)^y = x^y * i^y
 			if self.real.is_zero() && rhs.imag.is_zero() {
-				if let Ok(n) = rhs.real.clone().try_as_usize(int) {
+				if let Ok(n) = rhs.real.try_as_usize(int) {
 					return self.pow_n(n, int);
 				}
 
@@ -380,8 +380,7 @@ impl Complex {
 		let sqrt = Exact::new(Self::from(1), true)
 			.add(exact.clone().mul(&exact, int)?.neg(), int)?
 			.try_and_then(|x| x.frac_pow(half.value, int))?;
-		i.clone()
-			.mul(&exact, int)?
+		i.mul(&exact, int)?
 			.add(sqrt, int)?
 			.try_and_then(|x| x.ln(int))
 	}
diff --git a/core/src/num/continued_fraction.rs b/core/src/num/continued_fraction.rs
index 59d8586b..755a78ea 100644
--- a/core/src/num/continued_fraction.rs
+++ b/core/src/num/continued_fraction.rs
@@ -61,7 +61,7 @@ impl ContinuedFraction {
 		let mut denominator = 1.0;
 		for term in self.into_iter().take(MAX_ITERATIONS) {
 			denominator = 1.0 / (denominator + term.as_f64());
-			result = result * denominator + term.as_f64();
+			result = result.mul_add(denominator, term.as_f64());
 		}
 		result
 	}
@@ -404,17 +404,11 @@ impl Iterator for BihomographicIterator {
 				}
 				BihomographicState::Shift { right_first } => {
 					if right_first {
-						if let Ok(()) = self.shift_right() {
-							self.state = BihomographicState::Initial;
-							continue;
-						} else if let Ok(()) = self.shift_down() {
+						if self.shift_right() == Ok(()) || self.shift_down() == Ok(()) {
 							self.state = BihomographicState::Initial;
 							continue;
 						}
-					} else if let Ok(()) = self.shift_down() {
-						self.state = BihomographicState::Initial;
-						continue;
-					} else if let Ok(()) = self.shift_right() {
+					} else if self.shift_down() == Ok(()) || self.shift_right() == Ok(()) {
 						self.state = BihomographicState::Initial;
 						continue;
 					}
@@ -807,8 +801,7 @@ mod tests {
 				.take(1000)
 				.map(|b| b.try_as_usize(&Never).unwrap())
 				.collect::<Vec<_>>(),
-			Some(1)
-				.into_iter()
+			iter::once(1)
 				.chain([2, 1, 1, 2, 36].into_iter().cycle())
 				.take(1000)
 				.collect::<Vec<_>>(),
diff --git a/core/src/units.rs b/core/src/units.rs
index c693d95a..784fc83c 100644
--- a/core/src/units.rs
+++ b/core/src/units.rs
@@ -237,7 +237,7 @@ fn query_unit_internal(
 	short_prefixes: bool,
 	case_sensitive: bool,
 	whole_unit: bool,
-	context: &mut crate::Context,
+	context: &crate::Context,
 ) -> FResult<(Cow<'static, str>, Cow<'static, str>, Cow<'static, str>)> {
 	if !short_prefixes {
 		for (s, p, d) in &context.custom_units {
diff --git a/core/src/value.rs b/core/src/value.rs
index b7117005..ffb0ec29 100644
--- a/core/src/value.rs
+++ b/core/src/value.rs
@@ -278,11 +278,11 @@ impl Value {
 		Ok(match self {
 			Self::Num(n) => {
 				let other = crate::ast::evaluate(other, scope.clone(), attrs, context, int)?;
-				if let Self::Dp = other {
+				if matches!(other, Self::Dp) {
 					let num = Self::Num(n).expect_num()?.try_as_usize(int)?;
 					return Ok(Self::Format(FormattingStyle::DecimalPlaces(num)));
 				}
-				if let Self::Sf = other {
+				if matches!(other, Self::Sf) {
 					let num = Self::Num(n).expect_num()?.try_as_usize(int)?;
 					if num == 0 {
 						return Err(FendError::CannotFormatWithZeroSf);