$\frac{\sin^2x}{\cos^2x}\left(1+\cot^2x\right)$
$\frac{x^3+2x-1}{x^2-3}$
$\left(t\right)\left(t+3\right)\left(t+2\right)$
$\int\left(x\sqrt{4x^2-32x+60\:}\right)dx$
$\frac{2}{3}y^2+4y$
$\lim_{x\to\infty}\left(\frac{3-x}{x+1}\right)$
$y'+3xy^3=0$
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