INSTRUCTIONS:
1 . Input numerators and denominators of two rational expressions and choose what to compute.
2 . To input powers type symbol ^. Example: 3x^4+2x^2-4 = $3x^4 + 2x^2 - 4$.
3 . The polynomial coefficients may be any real numbers.
4 . You can skip the multiplication sign. Example: 5*x^2 is the same as 5x^2.
5 . Use $x$ as variable.
6 . The examples of valid expressions are 3x^3 + 2x^2 - 1 and 2*x^2 - 3*x + 5.