$-2a\left(b+3-2a\right)$

$\int\left(\tan\left(y\right)+\sec\left(y\right)\right)^2dy$

$\left(\sqrt{x}-\frac{1}{\sqrt{x}}\right)^2$

$4x^2-8x+2x^3$

$\left(10h+15k\right)^2$

$\left(4sin\theta\:+4cos\theta\:\right)^2=16+16sin2\theta\:$

$\lim_{x\to1}\left(\frac{5-5\cdot e^{2x}}{\tan\left(4x\right)}\right)$