$\frac{-26+-1}{+15+-6}$
$36x^2\:-\:196$
$\int\frac{9x^2-16x+4}{x^3-3x^2+2x}dx$
$20+90+510$
$sin\left(3\pi-x\right)=sinx$
$\frac{2}{-4-x}\le-2$
$8m+8-2m$
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