$-7\cdot\left(8-5\right)+24\left(-13+7\right)$
$4x^2+4x-3$
$-63-\left(-5\cdot14\right)$
$\left(5m^5+3n\right)\left(5m^5-3n\right)$
$100\left(a+b\right)^2-36\left(a-b\right)^2$
$1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20$
$4x-x^2-12\le0$
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