$\frac{1}{sec^2a}+sen^2a=1$
$\left(8^{0.4}\right)\cdot\left(60^{0.6}\right)$
$\lim_{x\to0}\left(\frac{1-\cos\left(5\pi x\right)}{2x}\right)$
$\lim_{x\to0}\left(1+sin3x\right)^{cotx}$
$8m^6+729$
$18=\frac{-3x+27}{13}$
$4.15y^{3}+20y^{2}-5y$
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