$\int\sin^7dx$
$\tan\left(360+x\right)^2$
$\frac{d}{dx}8x\sqrt{x-9}$
$e^x\frac{dy}{dx}=e^{-y}+e^{2x-y}$
$81x+19y-30z+6y-80x+x-25y+6-3+2-1+4$
$\frac{-2}{x-1}=\frac{x-8}{x+1}$
$\frac { 8 } { 1 x ^ { 3 } - 4 x ^ { 4 } }$
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