$1x^2-2x-6$
$-0.25x^2+2x+11$
$-13\:+\:|\left(-8\right)\:+\:11|$
$x18-3\cdot4+2$
$\frac{\left(2ax\:+\:4bx\right)}{3ay+6by}\:$
$\left(2x^2y-3b\right)^3$
$-3-5+2-11-7+4$
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