$-3a^2+3a$
$9a^2-12ab+15a^3b-24ab^3$
$x\frac{dy}{dx}=y+x^3+3x^2-2x$
$x^2+5x+8=0$
$\lim_{x\to0}\left(e^x-1\right)\left(csc\left(10x\right)\right)$
$\frac{x^5-x^4+x^2-2}{x^2+1}c$
$-68\:-7\:4$
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