string-math | Supports variables | Math library

// Same API as a calculator instance
double result = SMath.Evaluate("1 + 1"); // 2
SMath.SetValue("myVar", 1);
double result = SMath.Evaluate("1 + {myVar}", ); // 2

+ (addition)
- (subtraction)
* (multiplication)
/ (division)
% (remainder)
^ (power)  

// Default variables collection is optional
ICalculator myCalculator = new Calculator(new VariablesCollection
{
	["a"] = 5,
	["PI"] = 3.1415926535897931
});

// Setting or creating variables
myCalculator.SetValue("a", 2);
myCalculator["b"] = 1;

doub  

ICalculator myCalculator = new Calculator();
double result = myCalculator.Evaluate("1 * (2 - 3) ^ 2"); // 1

// Using custom operators
myCalculator.AddOperator("abs", a => a > 0 ? a : -a);
double result = myCalculator.Evaluate("abs -5"); // 5