$\frac{2x+2a}{x+a}$
$taylor\:\frac{x^3}{\sqrt[4]{1+x^7}}$
$\lim_{x\to-\infty}\left(\frac{x^2-40}{x-5}\right)$
$\frac{12x^{10}}{5x\left(3x^2\right)}$
$\left(3x^2-y^3\right)^2$
$2y^3-4y-8y^2$
$\int\:\sec\:^2\left(w\right)dw$
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