Verified answer

eu espero que esteja certo

7ab

ab-3cd+2ab-ab+3cd+5ab

ab-3cd+2ab-ab+3cd+5ab

-3cd+2ab+3cd+5ab

ab-3cd+2ab-ab+3cd+5ab

2ab+5ab

ab-3cd+2ab-ab+3cd+5ab

2ab+5ab

(2+5)ab

7ab

ab-3cd+2ab-ab+3cd+5ab

7ab

resposta

7ab