$6z^2+3z-18$
$2x+2^2$
$9b^2-6b+3$
$\frac{10}{\sqrt{0.625}}-\frac{4}{\sqrt{164}}$
$3\cdot\left(x+5\right)$
$6x-2y=-6$
$2x^2+8x+8-x+2$
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