$4\cdot2-2\cdot3+1$
$10y+8=-6+9y$
$4x^2-9^2+30x-25$
$2\left(6y+4z\right)-8z$
$\left(y^5-10x^4\right)^2$
$14^4\cdot14^{-2}$
$x^6-12^3y^2+36y^4$
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