I am trying to find a regex for the following user generated possibilities:

`÷2%3%x#4%2$@`

OR

`÷2%x#4%2$@`

OR

`÷2%x#4$@`

OR

`÷2%x@`

** To understand the expression**, it is a fraction whose numerator lies between

the

`÷`

and the first `%`

, and the denominator lies from first `%`

to the `@`

.But, the denominator has an exponent, which lies from the

`#`

to `$`

.The **user can input whatever number he/she desires**, **but the structure stays** the same. Notice that the number can also be a decimal.

**The structure is as follows**: ÷(a number, if its two or more digits a % will be in between the digits)x(a group that consists of a number(s), also the symbols # , $ and a %(s) which can also alternate between the digits)@

*Remember, the number can be a decimal number.*

I am trying to use the following regex with no success:

```
"[÷]-?\\d+(\\.\\d*)?[%](-?\\d+(\\.\\d*)?){0,1}[x]([#]-?\\d+(\\.\\d*)?[$]){0,1}[@]"
```

I think that the group `(-?\d+(\.\d*)?){0,1}`

is complicating things up.

Also, I have not accounted for the `%`

within this group which could occur.

any suggestions, thank you