$\frac{1}{3}\log\left(x+y\right)+\log\left(\frac{y}{z}\right)$
$2xy\:-\:3xy\:+\:xy\:-\:2xy$
$\:y+3y^2+8y+y^2$
$\left|-4\right|-\left|-5\right|$
$\left(2-4w\right)^2$
$3x^2+x+-1+5x+x^2+-6$
$\left(4^1\right)^3\left(3^1\right)^1$
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