$12x^2+8x-20$
$f\left(x\right)=\frac{1}{3}\sec^3\left(2x\right)-\sec\left(2x\right)$
$\int\:\frac{\sqrt{x^2-1}}{x^4}dx$
$\:f\left(x\right)=x^2-7x+6$
$\left(-4+m^3\right)\left(4+m^3\right)$
$6n^4,\:20n^3,\:14n^2$
$\frac{4x^2+8x+6}{2x-5}$
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