$\left(10x^3-9y^5\right)^2$

$\cos\:\left(-u\right)=\cos\:\left(u\right)$

$1+\cos\left(x\right)-\sin^2\left(x\right)$

$\lim_{x\to-2}\frac{\left(x+2\right)}{x^4-16}^2$

$x^2+\sqrt[3]{a}x+\sqrt[3]{a^2}$

$\frac{160x^{-3}y^2}{-40x^2y}$

$\lim_{h\to0}\left(\frac{\sin\:\left(a+h\right)-\sin\:\left(a\right)}{h}\right)$