$\int\tan\left(\pi-\frac{3y}{2}\right)^4dy$
$\int-\frac{cosx}{8-5sinx}dx$
$7x+y\:\:-8y-3z$
$x-2y=3$
$10x^2+20x+10$
$e^r\left(e^{r+1}\right)$
$\left(a+r\right)^2$
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