3x + 5 + 2x
5x + 5
5x + 4 + 3x + 2
8x + 6
3x + 2y + 5x + 7
8x + 2y + 7
4a + 2a + 7
6a + 7
2a + 3a + 5b + 4
5a + 5b + 4
6a + 4b + 2a + 3b
8a + 7b
6y + 9 + y
7y + 9
7m + 6 + m + 4
8m + 10
8x + 3y + 4x + 2 + y
12x + 4y + 2
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