$\left(7+y\right)^3$
$\frac{y^{10}-1}{y-1}$
$4ab-2ac+12ad$
$\left(3x-7y^2\:\right)^2$
$\lim_{x\to-2}\cos\left(\frac{1}{x+2}\right)$
$\lim_{x\to0}\left(\frac{6x-2x\cos\left(x^2\right)}{senx}\right)$
$\frac{1}{\tan^{2}\left(\theta\right)}$
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