$-22n-15+18n$
$a^2-8a+15$
$-12sin^2t+8cos^2t$
$\left(\frac{s^{-5}}{s^6}\right)^{\frac{3}{11}}$
$\left(1-\cos\:\left(\theta\:\right)\right)\left(1+\sec\:\left(\theta\:\right)\right)$
$2y\left(y+2\right)=0$
$sin^2\left(2x\right)\:+\:cos^2\left(2x\right)$
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