$\lim_{x\to0}\left(\frac{sen\left(x\right)}{x}\right)$
$\sqrt[4]{b^{-4}}+4\sqrt[4]{b^{-8}}-5\sqrt[4]{b^{12}}$
$\frac{y^{10}y^{0}}{y^{7}}$
$\frac{dy}{dx}=6x^2-5$
$4x=52$
$-28+49+-35+56$
$\left(2\:n\:n\:7\right)^2$
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