# How do you simplify  (17x^5 + 19x^2 + 15) - (9x^7 - 11x - 17)?

$17 {x}^{5} + 19 {x}^{2} + 15 - 9 {x}^{7} + 11 x + 17 =$
$= 17 {x}^{5} + 19 {x}^{2} - 9 {x}^{7} + 11 x + 32 =$ ordering the exponents:
$= - 9 {x}^{7} + 17 {x}^{5} + 19 {x}^{2} + 11 x + 32$