Method 1: First, we break up the numerator into its individual terms and write each term over the denominator. We need to deal with the numerator on its own terms. It doesn't like being trifled with.

Then we simplify each new term to find:

2x^{3} + 4x^{2} + 3x

Method 2: We can also just factor out a 10x^{2} in the numerator and denominator, then cancel the daylights outta that thing.