Equation.js/lib/README.md

Equation

Solve math expressions or create equations for repeated and complex Math tasks.

// solve
console.log(Equation.solve('4 * lg4 ^ 3')); // 32 

// equations
let sphereArea = Equation.equation('4 * PI * r^2');

console.log(sphereArea(5)); // 314.1592653589793