$-68\:-7\:4$
$\left(4c+4\right)\left(4c-4\right)$
$5x-3\le7-3x$
$\frac{\csc\left(x\right)}{\cos\left(x\right)}\:-\:\frac{\cos\left(x\right)}{\sin\left(x\right)}$
$\sqrt{3}\cot\left(\frac{5\pi}{7}\right)x=3$
$\frac{d}{dx}2e^{x^2}\cdot x+\frac{2}{x}$
$\left(m+7\right)\left(m-4\right)\:\:\:\:\:\:\:\:\:\:\:\:$
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