$\left(f^4+9\right)\cdot\left(f^4-9\right)$
$\left(3m^{x-1}+n^{5x}\right)^2$
$9\left(-3\right)^2\:+\:12\left(-3\right)\:+\:6$
$\lim_{n\to0}\left(\frac{2x+3x}{3^x+2x}\right)$
$2-\tan^2=3-\sec^2$
$-\frac{6}{11}-\:\frac{5}{11}$
$\int y^2\left(y^3-5\right)dy$
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