$\left(1+\tan\left(x\right)^2\right)\left(1+\tan\left(x\right)^2\right)$
$m^2-5m+24$
$\left(-6x-5\right)^2$
$\lim_{x\to-2}\left(3x^2+5x-1\right)$
$\lim_{x\to\infty}\left(\frac{x+\sin\left(x\right)}{3x+\cos\left(x\right)}\right)$
$1-cos2x$
$121c^4-\:1$
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