$-sen90\cdot\left(cos\left(cos^245\right)\right)\cdot cos\left(sen^245\right)$
$\lim_{t\to0}\frac{t^3}{\sin^23t}$
$\left(2x-y\right).\left(4x^2-2xy-y^2\right)$
$4\pi+\frac{4000}{r^3}$
$x^2+20y=10$
$\sqrt[3]{\frac{-8z^6}{x^6y^3}}$
$\left(40x^220\cdot x^4\right)$
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