$sen\:x\:+\:tg\:x\:=\:sen\:2x$
$\lim_{x\to0}\left(\frac{sin3h+1-cosx}{x}\right)$
$\left(15x-2\right)^2$
$\csc\left(-z\right)$
$6x^2\:+\:4x\:-3y\:+31=0$
$6a-216a^2+72a^3-36a^4$
$\left(3y^3-42y^2+192y-288\right)\left(y-4\right)$
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