The following are correct. What 's the difference if you leave in "on" or not? What 's the difference between leaving in "on" and omitting it?
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alc241 Is there a difference in meaning between if you use x word from Y word?/between using X and Y./in meaning if you use X and/or Y?You are making things unnecessarily complicated.
2 There won't be that big a difference in weight (between) if you put it in and/or if you don't./than if you don't put it in.