$\frac{x^2+2x+1}{x+1}\ge3$
$\left(9x^2-\:2y-4\right)^2$
$81a^2b^4+54a^6b^3+9a^4b^2$
$\frac{2}{3x}+x$
$\left(5j+9k\right)\left(5j-9k\right)$
$\left(2x-6\right)\left(3x+2\right)$
$-6\le\frac{g}{7}-7$
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