Question

5x5 + 8x2 + 2x – 3x9 – 8x4 – 4x5

Answer 1

I'm assuming that the number after the variable is supposed to be the exponent.

$5x^{5}+8 x^{2} +2x-3x^{9}-8x^{4}-4x^{5}$

Combine like terms to get:

$-3x^{9}+x^{5}-8x^{4}+8x^{2}+2x$