$\frac{3x}{1+3x}<1$
$\lim_{x\to\infty}\left(\frac{2^{2^x}}{2^{x^2}}\right)$
$7+-3+2$
$\frac{dy}{dx}=\frac{\cos^2\left(y\right)}{\sin^2\left(x\right)}$
$\left(8c-3a\right)\left(9c-5a\right)$
$\int-2x^{-4}dx$
$\lim_{x\to-1}\left(\frac{x^2-2x+1}{x^2-1}\right)$
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