1. -2ab+(-5ab)= -2ab-5ab= -7ab2. 3y + 4y - 5x - 5y= 2y -5x3. 12x^2y + 5x^2y - 4x^2y= 13x^2y4. 6z + 10z - 10z - 2z + 8= 4z +85. 6abc + 2ab + 8cb - 2abc - ab - 2ab=4abc-ab+8cb
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1. -2ab+(-5ab)=
-2ab-5ab= -7ab
2. 3y + 4y - 5x - 5y=
2y -5x
3. 12x^2y + 5x^2y - 4x^2y=
13x^2y
4. 6z + 10z - 10z - 2z + 8=
4z +8
5. 6abc + 2ab + 8cb - 2abc - ab - 2ab=
4abc-ab+8cb