Add: 5x-8y+2z, 3z-4y-2x and 3x-2z-3y
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5x - 2x - 3x - 8y - 4y - 3y + 2z - 3z- 2z
5x - 5x - 8y - 8y + 2z - 1z
0 - 0 + z
z is answer
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