public void TestNumeric()
{
Assert.AreEqual(5, (calc.Eval(exprString: "2+3") as NumericOperand)?.Value);
Assert.AreEqual(10, (calc.Eval(exprString: "2*3+4") as NumericOperand)?.Value);
Assert.AreEqual(11, (calc.Eval(exprString: "2*3+(4+1)") as NumericOperand)?.Value);
Assert.AreEqual(10, (calc.Eval(exprString: "2+3+(4+1)") as NumericOperand)?.Value);
Assert.AreEqual(10, (calc.Eval(exprString: "2+2*(1+3)") as NumericOperand)?.Value);
Assert.AreEqual(8, (calc.Eval(exprString: "2^3") as NumericOperand)?.Value);
Assert.AreEqual(5, (calc.Eval(exprString: "2^3 - 3") as NumericOperand)?.Value);
Assert.AreEqual(6, (calc.Eval(exprString: "2^3 - 3 + 1") as NumericOperand)?.Value);
Assert.AreEqual(6, (calc.Eval(exprString: "3 * 10 / 5 ") as NumericOperand)?.Value);
Assert.AreEqual(12, (calc.Eval(exprString: "(2^3 - 3 + 1) + (3 * 10 / 5)") as NumericOperand)?.Value);
Assert.AreEqual(12, (calc.Eval(exprString: "2^3 - 3 + 1 + 3 * 10 / 5 ") as NumericOperand)?.Value);
Assert.AreEqual(7, (calc.Eval(exprString: "2^3 - 3 + 1 + 3 * 10 / 5 - 5") as NumericOperand)?.Value);
Assert.AreEqual(7, (calc.Eval(exprString: "2^3 - 3 + 1 + 3 * ((4+4*4)/2) / 5 + -5") as NumericOperand)?.Value);
}
