3 2/ 3 + 2 3/ 4 + 1 1/ 2 =?

? = 3²/₃ + 2³/₄ + 1¹/₂
= 3 + 2 + 1 + (2/3 + 3/4 + 1/2)
= 6 + (8 + 9 + 6)/12 = 6 + (23/12)
= 6 + (1¹¹/₁₂) = 7¹¹/₁₂