$\frac{\frac{1}{\sin\left(u\right)}}{-u-\frac{1}{\sin\left(u^2\right)}}$

$\left(3b+11c\right)\left(3b-11c\right)$

$\left(x+2\right)\left(x+4\right)-2x+8$

$\left(4\right)^8\left(8\right)^4\left(32\right)^5$

$\frac{dy}{dx}y^2\:-\:x^2\:=\:6$

$\lim_{x\to1}\frac{x^{3\:}-6x^2+5x}{x^4-x^3+x-1}$

$4x^3-32y^3$