$20+90+51v$
$-110\left(-25\right)$
$3x^2+2x-1+-2x^2-5x\:+6\:+\:-\:x^2-2x\:-1$
$\frac{1}{8}+\frac{7}{8}$
$\frac{dy}{dx}\left(cos\left(y\right)+sin\left(x\right)=y\right)$
$\tan^2+\cot^2+2=\sec^2\cdot\csc^2$
$\frac{x^3-6x^2-x+30}{x-3}$
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