$\left(2x+1\right)^2-3x^2\ge x+5$
$-\left(0+3\right)^2$
$40\cdot69$
$x^4+11x^2+28$
$y\left(x-4\right)=x\left(y-6\right)$
$4-7\cdot4-1$
$\left(x\:+\:3\right)\left(x\:-\:3\right)$
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