$-1^2-5-1$
$\lim_{x\to-\infty}\sqrt{2x^2+4}-\sqrt{5x^2-5}$
$\frac{5}{x+1}=\frac{6}{x-1}$
$y^{'\:}+5=2x^2$
$18x^2+36-4x^2+20$
$\int\sqrt{\sec^25x}sec^25xtan5xdx$
$\frac{dy}{dx}\left(x^y=y+1\right)$
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