$z^2-3z$
$\frac{\sin\left(x\right)}{csc\left(x\right)-1}+\frac{\sin\left(x\right)}{csc\left(x\right)}$
$a^2+22a+22$
$\left(x\:-6\right)^2$
$22^2+33+7$
$e=\frac{xy}{z^2}$
$\int\frac{2x}{\sqrt{25-x^{2}}}dx$
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