Please decompose j(x) into 2 functions f(x) & g(x) so that j(x) = f(g(x)).

Note: neither f(x) or the g(x) should equal identity function x

1. j(x) = 2x³-5

2. j(x) = (2x-6)³

3. j(x) =(x3)33

Please show step by step, don't just write the answer.