$\int\left(\frac{x^2+x}{x^2+x+1}\right)dx$
$-y^4\:+\:20y^3\:-132y^2\:+369y\:-378$
$5x-8<107$
$-7x^2-x+2x^2$
$2\left(x\:+\:6\right)\:-\:8\:$
$\frac{x}{\sqrt{x^2-2}}$
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