$\sin\:^{\left(2\right)}\theta\:-\cos\:^{\left(2\right)}\theta\:\cdot\sin\:\theta\:$
$-\left(\frac{-14}{2}\right)^{2}$
$14mn2-25mn+9n^2$
$\left(n^2\:+\:13\right)\left(\:n^2\:-\:13\right)$
$\left(x\:+\:y\right)^2\:z^2$
$\frac{3x^3+5x^2+x-5}{-3x+1}$
$\frac{14}{\left(-7\right)}$
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