$-88-531$
$-1\frac{2}{1}$
$\lim_{x\to-1}\sqrt{51-2x}$
$\lim_{x\to\infty}\arctan\left(x^6-x^8\right)$
$\frac{3}{x+5}-\frac{1}{x-2}=\frac{7}{x^{2}+3x-10}$
$x\:x\:\sqrt{x^2+1}+x$
$\int\left(3x^5-3x^3+1\right)dx$
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