$\left(x^3+x^2\right)\left(x^3-x^2\right)$
$4x+4y-\left(4x+z-3y\right)-x+y-2z$
$1-sin^2x=cosx$
$\frac{3a^2-3^3}{3a-3}$
$2x+8=2\left(x+4\right)$
$\int\sqrt{x+z}dz$
$w^9\cdot w^5\cdot w^4$
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