$csc^2\:3x\:cos3x$
$\lim_{x\to\infty}\left(e^x-3^x\right)$
$\sqrt{\:3^{x^2}^{+\:xy}\cdot\:\:3^{y^2}^{+\:xy}}$
$\log\left(x+2\right)+\log\left(x-1\right)=\log\left(4\right)$
$-14y=28$
$\left(9+2y\right)^2$
$\cos\left(2x\right)+\sin\left(x\right)=4\sin^2\left(x\right)$
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