Create README.md

Author: Lexz-08

README.md

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+## Math.Basic
+### Description
+A C# library for performing basic math operations.
+
+### How To Use
+```csharp
+
+using Math.Basic;
+using System;
+
+public class Program
+{
+    public static void Main(string[] args)
+    {
+        Console.WriteLine("\n{0}", MathOperations.Add(1.25f, 0.75f));
+        Console.WriteLine("\n{0}", MathOperations.Subtract(1.25f, 0.75f));
+        Console.WriteLine("\n{0}", MathOperations.Multiply(1.25f, 0.75f));
+        Console.WriteLine("\n{0}", MathOperations.Divide(1.25f, 0.75f));
+        Console.WriteLine("\n{0}", MathOperations.GetPowerOf(1.25f, 0.75f));
+        Console.WriteLine("\n{0}", MathOperations.Modulo(1.25f, 0.75f));
+        
+        // total output
+        /*
+        
+       Add()  2
+            
+  Subtract()  0.5
+            
+  Multiply()  0.9375
+            
+    Divide()  1.67
+            
+GetPowerOf()  1.18217701
+            
+    Modulo()  0.5
+    
+        */
+    }
+}
+
+```