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RyBolt · Answer 1 · 2019-09-28T11:15:54+0000

You can do addition and substraction operations with polynomials similarly as with simple real numbers.

First of all you have to open brackets and then you can add numbers (-7-4=-11). Then the result is following:

(m^2n^2-7)-(mn+4) =m^2n^2-7-mn-4=m^2n^2-mn-11

(m^2n^2-7)-(mn+4) =m^2n^2-7-mn-4=m^2n^2-mn-11

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