$-x^2-7x-60$
$3x^2-4x$
$\lim\:_{x\to3}4+\sqrt{-x-3}$
$-145-\left(+312\right)$
$a^3b^6-512c^9$
$42x-4-5x-10+x^3-22x^2+5x+8$
$6.5+11.6$
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