$2x+4n=x-m$
$-2\:x\:-1$
$x^6+2^2$
$3\left(x^4+2x^2+15\right)$
$\int\left(x^2+1\right)\left(x-3\right)dx$
$\frac{x^2-x+1}{2-x}\ge1$
$8\cdot61$
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