$9p^2-12p+4$
$2cosx-1=5$
$\sqrt{x}=-3$
$\left(\frac{2x}{1\left(\left(x+2\right)-1\right)}\right)$
$\left(-2\right)^4\cdot\left(-2\right)$
$sec\:x-\frac{1}{sec\:x}$
$\frac{\left(1+\cot\:^2\left(x\right)\right)}{2\cdot cot\left(x\right)}$
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