$\left(x^{2a+2}-3x^{a-2}\right)^2$
$16x^4+24x^2+9x$
$a^2-9a+36$
$10n+4+\left(-3n\right)+2$
$\int49tan^5xsec^4x\:dx$
$4u^2+28u+49$
$\left(-4x^5+6x+8\right)\left(2x^2\right)$
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