The sum of 2x +y+5z and 5x +2y+3z, 3x+y+8c, 7x+y+2z, 3x-y-z, 7x+3y+8z, Find the sum of 2m+3n-p and 6n-4p, 2m+9n-5p, 6n-4p, 8n-p, 2m+3n+p, Subtract 3x+5y from 7x+2y., 4x+7y, 10x-3y, 4x-3y, 7x+5y

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