$27\sqrt{7}\left(8\sqrt{5}\right)$
$\left(4s+2\right)\left(5s^{2\:}+10s+3\right)$
$4x^2-28xy+49y^2$
$2+2\cdot1-3\cdot4$
$3x^2+9x\ge0$
$\frac{5s^2-2+1}{s^4+4s^3-6s^2+4s+1}$
$3\left(-2x+3\right)>x+1$
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