$8\cdot56$

$\frac{500}{q+2};q=104$

$\lim_{x\to0}\left(\frac{e^{xy}-1-y}{x^2}\right)$

$-5\left(2x-1\right)=45$

$\int\sin\left(4\right)x\cos\left(4\right)dx$

$\left(y\ln x+y\right)dx+\left(x\ln x-e^y\right)dy=0$

$\frac{d}{dx}\left(\frac{xsin^2\left(x^6\right)}{\sqrt{x^4+1}}\right)$