$-4z+31>17z+23$
$-x+4y-3z=-3\:\:\:\:$
$\left(4x-5y\right)-\left(-10x\right)-y$
$6x+12\cdot8x-5$
$5\ln\left(x\right)+\frac{3}{4}\ln\left(y\right)$
$x^3+3^2-4$
$4x^4+4x^2+4$
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