$\lim_{x\to0}\left(\frac{4e^t-4}{t^2}\right)$
$\sqrt{x-3}=7$
$\lim_{x\to0}\left(\frac{1-sin\left(x\right)}{x\cdot sin\left(x\right)^{\frac{3}{2}}}\right)$
$1^{-44}$
$\frac{1}{1+2x}\ge-0.1$
$2\cos\:\left(x\right)-5\cos\:^2\left(x\right)+3$
$\left(3x^5-9y^4\right)^2$
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