Question 174496
You need to use ( ) in the denominator to properly present this problem.
If you mean 4/(cubert3-1) 
Then:
4/(cubert2)
4/1.26
3.1746 ans.
If you mean 4/cubert3)-1
Then
(4-cubert3)/cubert3
(4-1.44)/1.44
2.56/1.44
1.78 ans.