5a - a+a+2a+a, 3d+5 - 4d+3-d+2, 3f + 3e - 2f+2e+f+e, 11c+11d - 4c+3d+7c+8d, 2a+2b - 5a-6b-3a+8b, p+q+3r - p+2q+r-q+2r, 3m+2n+mn - 3m+2mn+2n-mn, -g-h - 3g-2h-4g+h, 5x+3y - 3x+7y+2x-4y,

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