6
25
15
18
Correct answer is C
m⊗n=mn+m−n
3 ⊗ (2 ⊗ 4)
2 ⊗ 4 = 2(4) + 2 - 4 = 6
3 otimes 6 = 3(6) + 3 - 6 = 15
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