Б) b-3-2b-2=-b-5
Г) x^2-3x-2x-1=x^2-5x-1
Е) 5b^2+2b-4b^2+3b= b^2+5b
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Б) b-3-2b-2=-b-5
Г) x^2-3x-2x-1=x^2-5x-1
Е) 5b^2+2b-4b^2+3b= b^2+5b