$2d\:\cdot\:4d-2$
$8x-7=33$
$x^4+4x^2-117$
$y\:=\:5x^2\cdot ln\left(3x+1\right)$
$f\left(x\right)=\left(3x^2-6\right)^3$
$5^2\:x\:z^2$
$x^2\left(x^4-1\right)+2x\left(x^4-1\right)+\left(x^4-1\right)$
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