$\sin^52x\cos^2\left(2x\right)$
$2x^{-2}-7x^{-1}-15=0$
$3ab\:\cdot\:4a^{-1}b^{-3}\:\cdot\:4a^2b^2$
$3.50+1.50+2.75$
$81+36p+4p^2$
$x^22x+50$
$\left(n+1\right)^2-2\left(n+1\right)+3$
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