$\lim_{x\to0}\:\frac{1-cosx}{x}$
$\int x^2\left(3x^3+5\right)^7dx$
$\sqrt{\left(-1-5\right)^2+\left(4-3\right)^2}$
$f\left(x\right)=\left(2x^3-3x^2+7\right)^2$
$\int_0^{52}15xdx$
$\sin\frac{7}{0.1}$
$\lim_{x\to2}\left(\frac{x^2+4x-12}{2x-4}\right)$
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