# What is the standard form of y= (x^2-4)(2x-10) + (7x+3)^2?

$y = 3 {x}^{3} + 39 {x}^{2} + 34 x + 49$
$y = 3 {x}^{3} - 10 {x}^{2} - 8 x + 40 + 49 {x}^{2} + 42 x + 9$
$y = 3 {x}^{3} + 39 {x}^{2} + 34 x + 49$