$\csc\left(72\right)+\csc^2\left(72\right)$
$a+b;a=2\:;\:b=a$
$4y^3z^3\left(2yz^4\right)^{-3}$
$\frac{\left(x^2+4x+100\right)}{x+5}$
$\int\:\frac{\left(\sqrt{x}+2\right)^2}{\:3\sqrt{x}}dx$
$121+22y+y^2$
$32.1-7.4$
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