$y=ln\left(\frac{1+e^x}{1-e^x}\right)$
$\frac{3x^2-1}{x-2}>-6$
$\int4x^3e^{7x^4}dx$
$\lim_{x\to2}\left(\frac{x^3-8}{\sqrt{2}-\sqrt{x}}\right)$
$\int\frac{\left(x-2\right)^2}{\sqrt[3]{x}}dx$
$\left(1-y\right)dx=2\left(1+x\right)dy$
$6\int\frac{1}{y^5}dy$
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