Architectural Changes in Math.js v2(josdejong.com)

  var exp = new Expression("a");
  exp = exp.multiply("b");
  exp = exp.multiply("x");
  exp = exp.add("c");

  console.log(exp.toString());

  exp = exp.evaluateAt({a:5, b:1, c:-1})
  console.log(exp.toString());

  var eq = new Equation(exp, new Expression("y"));
  console.log(eq.toString());

  var x = eq.solveFor("x");
  console.log("x = " + x.toString());

  abx + c
  5x - 1
  5x - 1 = y
  x = 1/5y + 1/5