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Identify like terms in each list. The first one is done for you.
1. 5a b 43 2a b2 2b 4 _____________________________________
2. n 4n3 2m 6m 5n 2n ________________________
3. 2d 5f 2g 7 3g g _____________________________
4. 7x2 x 3x2 2 y2 3 3x _____________________________________