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Negative term in the front of a multi-term expression.

If a multi-term expression starts with a negative term, then we move the first positive term to the front. It can be done since addition is a commutative operation, that is why the order of the terms can be altered.

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If a multi-term expression starts with a negative term, then we move the first positive term to the front. It can be done since addition is a commutative operation, that is why the order of the terms can be altered.


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