$\lim_{x\to9}\left(9-x\right)$
$\int_{\sqrt{2}}^{x^2}\left(tan\left(9t\right)\right)dt$
$x^2+2x+1<0$
$\left(x^3-4y\right)\left(x^3-2y\right)$
$80\:+\:34$
$4x^2-8x-21$
$\lim_{x\to0}\left(1+\sin^2\left(2x\right)\right)^{\frac{3}{4}}$
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