$3^4\cdot3^53^8$
$\left(c^2\:b^2\:\right)\:\left(2cb^3\right)$
$\left(-4\right)\cdot\left(-3\right)\cdot\left(-3\right)\:\cdot\left(-2\right)$
$\frac{1-\sin\left(t\right)^4}{\cos\left(t\right)^2}=2\cos\left(t\right)^2$
$2k-2\le4$
$\left(2^2+1^2\right)$
$x'+w^2=0$
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