$12+\left(-17+13+\right)\left(-43\right)$

$\frac{d}{dx}\left(2xy+\pi\sin\left(y\right)=2\pi\right)$

$\left(5x-2y\right)\left(8x+3y\right)$

$\lim_{x\to2}\left(\frac{5x^2-10x}{x^2-6x-16}\right)$

$x+1\:=\:2x\:+\:2^{t+2}\:-1$

$\left(x^8y^3-2m^8\right)^2$

$\frac{x^4+2}{x^2+x+4}$