$\left(30x-1^2\right)$
$\frac{d}{dx}5xy^7-y^3=9x+4y$
$\left(8y+4\right)^2$
$x^2+2x-5x-10$
$\frac{\cos2x+1}{2}$
$u\left(3u+5\right)=0$
$2x-5x-9x$
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