$6y^2+2$
$\frac{1}{x^4+6x^3+9x^2}$
$-x\left(\frac{-3}{4}\right)+xy\left(\frac{-3}{4}\right)-y\left(-3\right)$
$2x+1\:+\:2x-1$
$2x^5+3x^4-18x-27\:$
$a-1\cdot4$
$-5x^2+5x-2x^2-8x+11-x$
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