diff --git a/src/Homework4/BracketChecker.fs b/src/Homework4/BracketChecker.fs
new file mode 100644
index 0000000..3553cd9
--- /dev/null
+++ b/src/Homework4/BracketChecker.fs
@@ -0,0 +1,50 @@
+namespace Homework4
+
+module BracketChecker =
+    type Facing =
+        | Fore
+        | Back
+
+    type Bracket =
+        | Round
+        | Square
+        | Curly
+
+    type Symbol =
+        | Bracket of Bracket * Facing
+        | Other
+
+    let getSymbolType symbol =
+        match symbol with
+        | ')' -> Bracket(Round, Back)
+        | '(' -> Bracket(Round, Fore)
+        | ']' -> Bracket(Square, Back)
+        | '[' -> Bracket(Square, Fore)
+        | '}' -> Bracket(Curly, Back)
+        | '{' -> Bracket(Curly, Fore)
+        | _ -> Other
+
+    let check brackets =
+        let rec checkRec currentBrackets currentStack =
+            match currentBrackets, currentStack with
+            | [], [] -> true
+            | [], _ -> false
+
+            | h :: tail, [] ->
+                match getSymbolType h with
+                | Other -> checkRec tail []
+                | Bracket(bracketType, Fore) ->
+                    checkRec tail (bracketType :: currentStack)
+                | _ -> false
+
+            | h :: tail, stackHead :: stackTail ->
+                match getSymbolType h with
+                | Other -> checkRec tail currentStack
+                | Bracket(bracketType, Fore) ->
+                    checkRec tail (bracketType :: currentStack)
+                | Bracket(bracketType, Back) when bracketType = stackHead ->
+                    checkRec tail stackTail
+                | _ -> false
+
+        let charList = brackets |> List.ofSeq
+        checkRec charList []
diff --git a/src/Homework4/Homework4.fsproj b/src/Homework4/Homework4.fsproj
index e831740..c766aad 100644
--- a/src/Homework4/Homework4.fsproj
+++ b/src/Homework4/Homework4.fsproj
@@ -6,6 +6,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <Compile Include="BracketChecker.fs" />
         <Compile Include="Program.fs" />
     </ItemGroup>
 
diff --git a/tests/Homeworks.Tests/BracketChecker.fs b/tests/Homeworks.Tests/BracketChecker.fs
new file mode 100644
index 0000000..dfb3167
--- /dev/null
+++ b/tests/Homeworks.Tests/BracketChecker.fs
@@ -0,0 +1,37 @@
+module Homeworks.Tests.BracketChecker
+
+open Expecto
+open Homework4.BracketChecker
+
+let getName brackets =
+    $"test on {brackets}"
+
+let createTest brackets expected =
+    test (getName brackets) {
+        let actual = check brackets
+        Expect.equal actual expected "Results must be the same"
+    }
+
+let generalTests =
+    [ createTest
+          "(()([][[{{(aadf) fdf} fdfa}]] klne)(){ rgqie}{} rgqrkqgie [][[r qiermgiqegi miemrgie{()()(({}))}]])"
+          true
+
+      createTest "" true
+
+      createTest "({([])})(2+3)() * ()(){}{kgkwemrgkmqe}{}{}[][qrgqerger][][]" true
+
+      createTest "(]" false
+
+      createTest
+          "(()([][[{{(aadf) fdf} fdfa}]] klne)() rgqie}{} rgqrkqgie [][[r qiermgiqegi miemrgie{()()(({}))}]])"
+          false
+
+      createTest
+          "(()([][[{{(aadf) fdf} fdfa}]] klne)(){ rgqie}{} rgqrkqgie [[[r qiermgiqegi miemrgie{()()(({}))}]])"
+          false
+
+      createTest
+          "(()([][[{{(aadf) fdf} fdfa}]] klne)(){ rgqie}{} rgqrkqgie [[[r qiermgiqegi miemrgie{())(({}))}]])"
+          false ]
+    |> testList "general tests"
diff --git a/tests/Homeworks.Tests/Homeworks.Tests.fsproj b/tests/Homeworks.Tests/Homeworks.Tests.fsproj
index b8f52cd..8dd7bf7 100644
--- a/tests/Homeworks.Tests/Homeworks.Tests.fsproj
+++ b/tests/Homeworks.Tests/Homeworks.Tests.fsproj
@@ -7,10 +7,12 @@
         <RootNamespace>Homeworks.Tests</RootNamespace>
     </PropertyGroup>
     <ItemGroup>
+        <Compile Include="BracketChecker.fs" />
         <Compile Include="Main.fs" />
     </ItemGroup>
     <ItemGroup>
         <ProjectReference Include="..\..\src\Homework1\Homework1.fsproj" />
+        <ProjectReference Include="..\..\src\Homework4\Homework4.fsproj" />
     </ItemGroup>
     <Import Project="..\..\.paket\Paket.Restore.targets" />
 </Project>
diff --git a/tests/Homeworks.Tests/Main.fs b/tests/Homeworks.Tests/Main.fs
index 4264e0b..00254a7 100644
--- a/tests/Homeworks.Tests/Main.fs
+++ b/tests/Homeworks.Tests/Main.fs
@@ -1,9 +1,9 @@
 open Expecto
+open Homeworks.Tests
 
 [<Tests>]
-let allTests = testList "all Tests" []
+let allTests = testList "all Tests" [ BracketChecker.generalTests ]
 
 [<EntryPoint>]
 let main argv =
-    allTests
-    |> runTestsWithCLIArgs [] argv
+    allTests |> runTestsWithCLIArgs [] argv