$-35+125-2-8+257-65$
$\frac{d}{dx}x^4sin^2x$
$38x^4-16x^5-9x^3$
$\frac{\csc\left(a\right)}{\tan\left(a\right)+\cot\left(a\right)}=\cos\left(a\right)$
$10a-15b$
$\sqrt{10y+4}-\sqrt{9y+8}=0$
$14xy^4\left(-14xy\right)$
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