\({4 \sqrt{5} (\sqrt{3j} + 8) - 3 \sqrt{15j} + \sqrt {5}}\)

4√5 (√ [3j ] + 8 ) - 3√ [ 15j ] + √5

4 √ [ 15j ] + 32√5 - 3√ [15j] + √5

√ [ 15j ] + 33√5

wouldn't it be √ [ 15j ] + 32√5 ?

No.....note that

32√5 + √5 is the same as

32√5 + 1√5 =

33√5