Expression Evaluator

Variable：=
Variable value：=
Simplest expression：=
Results : =

Example:

Variables: x, y, z

Variable values: 10, 20, 60

Simplest expression: x+y+(2*z)

Rule:

2x is represented by 2*x

x2 is represented by x ^ 2

log, sin, cos are represented by log(x), sin(x), cos(x)