$\left(0.3\:xyz\right)^2$
$100v^2-220+121$
$x^2+18x+162$
$\:+4\:-1$
$14>w+-2$
$\frac{6a^4+5a^3-1}{2a^2+a-1}$
$y-x-3x^2=0$
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