diff --git a/main.py b/main.py
index 2cd463c..3fa862b 100644
--- a/main.py
+++ b/main.py
@@ -8,7 +8,9 @@ def main():
     expression: str = 'IF("text" - "t" == "ex", "Correct", "Incorrect")'
     variables: dict[str, any] = {}
     string_embedded: bool = False
-    result: dict[str, any] = oqs_engine(expression=expression, variables=variables, string_embedded=string_embedded)
+    result: dict[str, any] = oqs_engine(
+        expression=expression, variables=variables, string_embedded=string_embedded, report_usage=True
+    )
     print(json.dumps(result, indent=4))
 
 
diff --git a/python_oqs_implementation/oqs/engine.py b/python_oqs_implementation/oqs/engine.py
index 5b12fc2..86f2ea2 100644
--- a/python_oqs_implementation/oqs/engine.py
+++ b/python_oqs_implementation/oqs/engine.py
@@ -1,17 +1,29 @@
 import re
+import time
 from .interpreter import OQSInterpreter
 from .errors import OQSBaseError
 from .utils.shortcuts import get_oqs_type
 
 
-def oqs_engine(
-        expression: str, variables: dict[str, any] | None = None, string_embedded: bool = False
+class ExpressionInput:
+    def __init__(self, expression: str, variables: dict[str, any] | None = None, string_embedded: bool = False) -> None:
+        self.expression: str = expression
+        self.variables: dict[str, any] = variables
+        self.string_embedded: bool = string_embedded
+
+
+def evaluate_expression(
+        expression: str | ExpressionInput, variables: dict[str, any] | None = None, string_embedded: bool = False
 ) -> dict[str, any]:
+    if isinstance(expression, ExpressionInput):
+        variables: dict[str, any] | None = expression.variables
+        string_embedded: bool = expression.string_embedded
+        expression: str = expression.expression
     try:
         if string_embedded:
             def replace_embedded(match: re.match):
                 embedded_expr: str = match.group(1)
-                embedded_result: dict[str, any] = oqs_engine(
+                embedded_result: dict[str, any] = evaluate_expression(
                     expression=embedded_expr, variables=variables, string_embedded=False
                 )
                 return str(embedded_result["results"]["value"])
@@ -31,3 +43,28 @@ def replace_embedded(match: re.match):
             },
             "additional_info": {"type": type(e).__name__, "message": str(e)}
         }
+
+
+def oqs_engine(
+        expression: str = None,
+        variables: dict[str, any] | None = None,
+        string_embedded: bool = False,
+        report_usage: bool = False,
+        evaluate_multiple: bool = False,
+        expression_inputs: list[ExpressionInput] = None
+) -> dict[str, any]:
+    start_cpu_time: int = time.process_time_ns()
+    if evaluate_multiple:
+        if expression_inputs is None:
+            expression_inputs: list[ExpressionInput] = []
+        expression_results: list[dict[str, any]] = []
+        for expression_input in expression_inputs:
+            expression_results.append(evaluate_expression(expression=expression_input))
+        results: dict[str, any] = {"results": expression_results}
+    else:
+        results: dict[str, any] = evaluate_expression(
+            expression=expression, variables=variables, string_embedded=string_embedded
+        )
+    if report_usage:
+        results["cpu_time_ns"] = time.process_time_ns() - start_cpu_time
+    return results