Combine like terms.12ab + 6 + 20ab2 + 13 + 17ab2 + 7ab + 15a2b2

A. 15a2b2 + 37ab2 + 19ab + 19
B. 12ab + 6 + 20ab2 + 13 + 17ab2 + 7ab + 15a2b2
C. 15a2b2 + 56ab2 + 19
D. 52a2b2 + 19ab + 19


Answer: A

Mathematics

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