$\left(7+b\right)\left(7-b\right)$
$-2q^2+28q=94$
$x^2-20x+99$
$7x+30\ge-40$
$1-\frac{\sin\:\left(x\right)}{\cos\:\left(x\right)}=cos^2\left(x\right)$
$\left(-2\right)\cdot\left(8+2-16\right)$
$2x^4+4x^3-3x-6$
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