$\frac{x^2-2y-8}{x^2-x-6}$
$8b+4b-b+2b$
$\frac{-x+1}{6}\le-1$
$cos\left(-x\right)-cos\left(x\right)=x$
$3a-8b-5a-4c-2a-11b-2c$
$\int\frac{\left(4x^3\right)}{\left(8-2x^4\right)^8}dx$
$0.455+0.455$
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