1. (2x2 -2y2 + 6xy) - (x2 -y2 + 2. Subtract (x - y + 3z) from (2z -x -3y) 3. (2x +3y -7z) + (-3x +y +9z) + (5x -2y +4z) 4. (a2 + b2 +2ab) - (a2 + b2 +2ab) 5. (-3m + 5m3) + ( m2 - 6m) + ( m3 - 7m2) 6.(5a2b) + (-8a2b) + (7a2b) 7.Add: 2a -3b +4c and b -2a -8c 8.Subtract (2a -3b +4c) from the sum of (a +3b -4c), (4a -b +9c) and (-2b +3c -a) Answer all the questions fast .
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