$x+2\cdot x+2$
$2x^2-7x-28$
$\frac{x^2\:+\:x\:+\:1}{x\:+\:2}$
$sin^2x+4\left(1-sin^2\right)$
$\int_1^12\pi\left(1-2x\right)dx$
$9-36+12m^2+m^4$
$10^{-6}\cdot10^7$
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