Using the digits 1 to 9 exactly once create a set of one or two digit prime numbers.
Use those prime numbers and the math operations + - / * and parantheses to get 100.
Then use those exact same prime numbers and the above math operations to get 1000.
So your equations will have all prime numbers (showing digits 1 to 9 used exactly once) on the left and 100 or 1000 on the right.
No programming and no partial answers.
I do expect more than one solution so one with the least number of math operations will be accepted.