1. Imaginary unit is denoted by i, not j.
2. Are you sure about parentheses? The value of the expression you typed is -1.2 + 40i.
3. If 4 + j(20 + j0.2) is enclosed in parentheses, the answer is still 3.82 + 0.93i, which is different from yours.
on the tutorial it shows some of the working.
(j20)(4 + j0.2)/
4 + j(20 + j0.2)
= (j20)(4 + j0.2)/
4 + j20.2
= (j20)(4 + j0.2)(4-j20.2)/
(4 + j20.2)(4 -j20.2)
=(j20)(4 + j0.2)(4-j20.2)/
16 + 20.2^2
then not sure how to work the numerator out
this is 4 steps, the spacings hasnt worked unfortunately.