$sen^2x-senx=0$
$12a-7ab+1,2ab^3$
$36x^7m^3-18x^9m^2+48x^3m^5$
$16x^{3}y^{2}-8x^{2}y-24x^{4}y^{2}-401x^{2}y^{3}$
$4^{x+2}=8^{1+x}$
$-25a-20$
$y^2+\frac{2y}{3}$
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