$\left(14x^5-8\right)\left(14x^5+8\right)$
$\int tan^7\frac{x}{2}\sec^2\frac{x}{2}\:dx$
$x^2+4x+8$
$\sin^2x-3\sin x=0$
$2x+3y-2y-x$
$6y^2-4y$
$p^2\:+\:4p\:-\:21$
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