) 3xy²-5xy²-x²y+5x³y=
2) 5z-2z+10z=

3) -3a²-5a³+7a²-2a³=

4) 2xy.2xy=

5) 7x².5x³=

6)(-2x³y⁴).(-3x³y²)=

SE PUDEREM ME AJUDAR EU AGRADEÇO
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