$-3x^2-\:-3x^2-\:-3x^2$
$\frac{2}{x+2}-\frac{3}{2x-5}$
$\left(z+16\right)^2$
$f\left(x\right)=\sqrt[10]{10^{10}}$
$\left(x^2+2\right)^2-3\left(3x^2-2x+4\right)$
$205.5+4.00+10.12$
$-2x-6=3x-21$
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