$\frac{x-2y}{2y}$
$4\cdot3-2-2$
$3j^2-2j-1=0$
$2x+4x-3x$
$\sqrt[5]{32x^{12}}$
$4x^2-2x-3+6x^2+x-6+2x^2-x+3$
$x^2+1-4x$
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