$\frac{60x^{7\:}b^2}{-45x^2b^7}$
$5x-1\ge-2$
$25x^220xy+16y^2$
$\int5x\ln\left|7x\right|dx$
$\lim_{x\to\infty}\left(\frac{20x}{20x+9}\right)^{8x}$
$\left(x^2+\sqrt{7}\right)^2$
$\frac{dy}{dx}=\frac{1}{\cos\left(x\right)^2}$
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