2 1/2 + 4 2/3 = (2 + 4) + (1/2³ + 2/3²) = 6 + 3/6 + 4/6 = 6 7/6=
=7 1/6
5 2/3⁴ - 4 3/6² = (5 - 4) + ( 8/12 - 6/12 ) = 1 + 2/12 = 1 2/12
2 1/2 + 4 2/3 = (2 + 4) + (1/2³ + 2/3²) = 6 + 3/6 + 4/6 = 6 7/6=
=7 1/6
5 2/3⁴ - 4 3/6² = (5 - 4) + ( 8/12 - 6/12 ) = 1 + 2/12 = 1 2/12