Question

Change the mixed expressions to fractions y+2 y^3/x^3-y^3

Answer 1

The common denominator for each of these terms is x^3 so the new expression would be:
$\frac{x^{3}y}{x^{3}} + \frac{y^{3}}{x^{3}} - \frac{x^{3}y^{3}}{x^{3}}$
so to simplify that down to a single fraction
$\frac{x^3y + y^{3}-x^{3}y^{3}}{x^{3}}$