Combining (Addition)
1a + 1a + 9
What is 2a + 9
1b - 2 - 2b
What is -1b - 2
-7w - 5 + 1w + 1
What is -6w - 4
5x + 3 + 3x + 2
What is 8x + 5
12c - 6c
What is 6c
9a - 6b - 1a
What is 8a - 6b
3 + 1t + 6t + 5
What is 7t + 8
5z - 5 - 1 - 1z
What is 4z - 6
-2f + 3f + 3 + 8
What is 1f + 11
2a + 2b + 2a + 2b
What is 4a + 4b
-3j - 1k - 2j - 2k
What is -5j - 3k
5t + 1 - 10t
What is -5t + 1