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5a+2a=7a2 5a﹣2b=3ab 5a﹣2a=3 ﹣ab3+2ab3=ab3
a2a3=a6 (﹣2ab)2=4a2b2 (a2)3=a5 3a3b2÷a2b2=3ab
6a+a=6a2 ﹣2a+5b=3ab 4m2n﹣2mn2=2mn 3ab2﹣5b2a=﹣2ab2
6a+a=7a2 ﹣2a+5b=3ab 4m2n﹣2mn2=2mn 3ab2﹣5b2a=﹣2ab2
x2y﹣2xy2=﹣x2y 2a+3b=5ab a3+a2=a5 ﹣3ab﹣3ab=﹣6ab
6a+a=6a2 ﹣2a+5b=3ab 4m2n﹣2mn2=2mn 3ab2﹣5b2a=﹣2ab2
x2y﹣2xy2=﹣x2y 2a+3b=5ab a3+a2=a5 ﹣3ab﹣3ab=﹣6ab
2ab+3ab=5ab 2ab﹣3ab=﹣ab 2ab•3ab=6ab 2ab÷3ab=
a2b ﹣3ab2 ab a2b2
6a+a=6a2 ﹣2a+5b=3ab 4m2n﹣2mn2=2mn 3ab2﹣5b2a=﹣2ab2
4a﹣9a+6a=﹣a 2ab﹣2ab=0 a3﹣a2=a ab﹣2ab=3ab
a2•a3=a6 (﹣2ab)2=4a2b2 (a2)3=a5 3a3b2÷a2b2=3ab