$350+3x>600$
$\left(-3\cdot7\right)+3$
$\:2x^2\:+\:2\:=\:3x$
$4\left(x+y\right)^2-9z^2$
$\frac{2}{x}<5$
$5n-30=-20$
$x^3-3x^2-5x+15$
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