$\left(x^{a-1}-3^{a-2}\right)^2$
$x^6-x^3$
$\frac{x^3-x^2-x-3}{x^2-3}$
$-2^3+8$
$2\sin^2\left(x\right)=-3\cos\left(x\right)$
$\sin^2x=\cos^2x-\cos\left(x\right)$
$\left(14w^4-4\right)\left(14w^4-48\:\right)$
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