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Ta bort parentes

Om en parentes adderas till ett annat uttryck kan man ta bort den utan att värdet ändras, t.ex.
5+(2−3)=5+2−3.
Om man enbart har multiplikation i och utanför en parentes kan man också plocka bort den, eftersom det inte spelar någon roll i vilken ordning man multiplicerar:
(4⋅8)⋅7=4⋅8⋅7.

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