2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项(2a-b)/3-(a+2b)/2-(5a-2b)/6

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2a-b/3-a+2b/2-5a-2b/6去括号并合并同类项(2a-b)/3-(a+2b)/2-(5a-2b)/62a-b/3-a+2b/2-5a-2b/6去括号并合并同类项(2a-b)/3-(a+2

2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项(2a-b)/3-(a+2b)/2-(5a-2b)/6
2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项
(2a-b)/3-(a+2b)/2-(5a-2b)/6

2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项(2a-b)/3-(a+2b)/2-(5a-2b)/6
(2a-b)/3-(a+2b)/2-(5a-2b)/6
=2/3a-1/3b-1/2a-b-5/6a+1/3b
=(2/3-1/2-5/6)a+(-1/3-1/2+1/3)b
=-2/3a-1/2b