$\int cos^2\left(\frac{y}{2}\right)dy$

$\left[\frac{-2a^{x+1}b^{x-3}c^z}{3ab}\right]\left[\frac{9b^{-x+z}c}{44a^x}\right]$

$9x^2+81x$

$\left(5\right)^2\:-\:-\left(3\right)^2\:+7$

$f\left(x\right)=\left(8x+y^{\left(x\right)}\right)\left(6x^{\left(2\right)}+8x\right)$

$8 x ^ { 3 } + 18 x ^ { 2 } - 86 x - 30$

$2304x^4-16y^6$