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a2+a2=2a4 2a2×a3=2a6 3a﹣2a=1 (a2)3=a6
a4+a5=a9 (2a2b3)2=4a4b6 ﹣2a(a+3)=﹣2a2+6a (2a﹣b)2=4a2﹣b2
3a2·(-2a3)=6a6 a(a2-1)=a3-1 (a+b)(a-2b)=a2-ab-2b2 -2a·(a2)3=-2a9
2a•3a=6a (﹣a3)2=a6 6a÷2a=3a (﹣2a)3=﹣6a3
3a﹣2a=a 2a•3a=6a a2•a3=a6 (3a)2=6a2
3a·2a=5a 3a·2a=5a2 3a·2a=6a 3a·2a=6a2
2a2+3a2=5a4 5a2-2a2=3 a3×2a2=2a6 3a6÷a2=3a4
a+2a=3a2 a•a2=a3 (2a)2=2a2 (﹣a2)3=a6
3a2﹣6a2=﹣3 (﹣2a)•(﹣a)=2a2 10a10÷2a2=5a5 ﹣(a3)2=a6
a2·a3=a6 3a2-a2=2 a8÷a2=a6 (-2a)3=-2a3
﹣2a6b9 ﹣8a6b9 8a6b9 ﹣6a6b9
3a•2a=5a 3a•2a=5a2 3a•2a=6a 3a•2a=6a2