$4-x>9$
$\left(3x-1\right)\left(x+2\right)-\left(2x-3\right)^2$
$5x-9<9x-11$
$\left(2d^7-c^3\right)^2$
$-9+7-6+2$
$\frac{2x+3}{x-1}\le2$
$\frac{x^2}{\left(1+x\right)^2}$
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