Добавлены операци:

SqrtY,
Factorial,
CubeRoot,
Square,
Cube,
PowY,
Log,
Ln,
Exp,
Inv,
Pi,
Sinh,
Sin,
Cosh,
Cos,
Tanh,
Tan

Services/ICaculator.cs

@@ -1,7 +1,8 @@
-namespace calculator.Services;
+using calculator.Common;
+
+namespace calculator.Services;
 
 public interface ICaculator
 {
-    string Calculate(string op1, string op2, string operation);
-    string SingleOperation(string operand, string operation);
+    double Calculate(Operation operation, double a, double? b = null);
 }