$-9+7+3-5-9+14+16-17-2-5$

$\frac{d}{dx}x^y=e^{x-y}$

$6mn-7mn-10mn+32mn$

$\lim_{x\to infinity}\left(\frac{x^6}{e^{-x^5}}\right)$

$\left(y+w\right)\left(y-w\right)$

$\lim_{x\to infinity}\left(1+\left(\frac{3}{9x}\right)\right)^{9x}$

$\frac{d^2}{dx^2}\left(y^2-xy+x^2\right)$