$-\left(x-c\right)\left(x+1\right)$
$\lim_{x\to1}\left(\frac{\arctan\left(x-\frac{\pi}{4}\right)}{\tan\left(\frac{\pi}{4}x\right)-1}\right)$
$\ln\left(2x-1\right)-\ln\left(3x+1\right)=\ln\left(e^2\right)$
$x^24x-3$
$\sin\left(2x\right)=-0.327$
$\sqrt[3]{2^2x^5y^4}$
$7x^2+35x+42$
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