$\left(\frac{3}{7}x+1\right)\left(\frac{3}{7}x-1\right)$
$\left(-2\right)-\left(-15\right)$
$\int\frac{t^3-2t}{t-1}dt$
$\lim_{x\to0}\left(4x^2e^x\right)$
$\frac{\csc\:^2\left(a\right)+1}{\csc\left(a\right)-1}=\csc\left(a\right)+1$
$\lim_{x\to-5}\left(\frac{x^4+5x^3-2x-10}{x+5}\right)$
$m^4-2m^3+3m^2-6m$
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