$y=ln\sqrt{\frac{1+sen\:t}{cos\:t}}$
$\frac{1}{y^2}dy=\frac{-x}{\sqrt{1+x^2}}dx$
$15x^2+57x+36$
$\left(2cos\left(3x\right)+1\right)-1cos$
$-8p^2-2p^2$
$e^{0.2}$
$4x^4+20^6+15^5$
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