The question is a ambiguous so here are a number of answers.
If it is (2a^(3/5)-3b^(4/2))^2 then
2.297a^1.+-81b^4
if ((2a^3)/5-(3b^4)/2)^2 then
6052.84a^6+39601b^8
if ((2a^3)/5-(3b^(4/2)))^2 then
2.56a^6+81b^4
if ((2a^(3/5)-(3b^4)/2)^2 then
4a^1.2+1640.25b^8
Next time, use brackets around fractions so it is clear if it is a divide or fraction. Thats one of the problems of using / for both divide and fractions.
The question is a ambiguous so here are a number of answers.
If it is (2a^(3/5)-3b^(4/2))^2 then
2.297a^1.+-81b^4
if ((2a^3)/5-(3b^4)/2)^2 then
6052.84a^6+39601b^8
if ((2a^3)/5-(3b^(4/2)))^2 then
2.56a^6+81b^4
if ((2a^(3/5)-(3b^4)/2)^2 then
4a^1.2+1640.25b^8
Next time, use brackets around fractions so it is clear if it is a divide or fraction. Thats one of the problems of using / for both divide and fractions.