$3\sqrt{2}+8\sqrt{18}$
$60+7t-t^2$
$\frac{\left(5x-11\right)\left(2x+8\right)}{2}$
$\lim_{x\to-1}\left(\frac{2x^4+4x^3+x+3}{x+1}\right)$
$4x^2-36x+81$
$\frac{sin^3\left(x\right)+cos^3\left(x\right)}{sin\left(x\right)+cos\left(x\right)}=1$
$9x^2<1$
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