$10m^3p^2-5m^6p^4$
$2x-5<20$
$\frac{1-2x}{x+2}\le-2$
$2x^2+2y^2=8$
$\left(+85\right)\:x\:\left(+45\right)$
$\lim_{x\to4}3x^4+6$
$f\left(x\right)=\frac{6x^2-x-1}{4x^2-4+1}$
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