$-145+673-32+7$
$7x^3+8x-10x-9x^2-2x$
$3,625+8,125-10,75-2,25+1,2-17+31.1$
$x+1=-3x+17$
$\left|\left(-5\right)-\left(-15\right)\right|:\left|\left(+6\right)-\left(+8\right)\right|$
$\left(\sqrt{3}x-1\right)\left(1+\sqrt{3}\:x\right)$
$x^2+6x-6+x^2-x+10$
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