$\lim_{x\to\infty}\left(x\tan\left(x\right)\right)$
$\lim_{x\to0}\left(x^0\right)$
$\left(k-7\right)\left(k-12\right)$
$\int7x^3e^{-5x}dx$
$\frac{x}{4}^2+4x+16$
$\sqrt[3]{a^{7}b^{12}}$
$\int\frac{1}{x^2\left(x^2+2\right)}dx$
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