$9xy+16z-9y-16xz$

$25-365-6$

$\frac{dy}{dx}\left(y^2-3\sec\left(x\right)\tan\left(x\right)+e^{5x}\cos\left(y\right)=8\right)$

$\int\:\frac{3x+1}{x^2+4x+3}\:dx$

$\lim\:_{x\to\:3}\left(x^2-2\right)$

$\int\left(u\right)^7\sin\left(2u^4\right)du$

$\lim_{x\to6}\left(\frac{60-6x-\left|x^2-10x\right|}{\left|x^2-100\right|-64}\right)$