$\left(a^2+2^2\right)$
$2\sin\left(2x\right)-2\cos\left(x\right)=0$
$\csc^2\left(b\right)\cdot\tan^2\left(b\right)=\sec^2\left(b\right)$
$6x-1>0$
$\left(-3x^3y^4\right)^4$
$\lim_{x\to0}\left(sen\:5x\right)$
$j^2+8j+16$
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