$xy^2+xz^2+xw$
$53+77+14$
$3a^3+6a^2+12a$
$\int\frac{3x+1}{\sqrt{x+2}}dx$
$x2\:+17x\:<\:18$
$\int\left(\frac{-3}{\sin^2\left(x\right)}\right)dx$
$\frac{d^2}{dx^2}\left(f\left(x\right)\:=\:tan\left(sen2\:x\right)\right)$
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