No, the standard for these types of puzzles is the solver is permitted to only concatenate the original
digits given in the puzzle at the outset, giving numbers to work with. The resulting numbers are then
operated on. Any resulting numbers in the expression are not allowed to be concatenated with each
other.
Post # 4 was a clarification and emphasis. Please do not make a post like # 5 again, which goes
against post #4, or the rest of your posts/solutions on here will be ignored, and credit will be
given to other users who post any correct solutions that match the ones that you have already
posted in this thread.
Neither solutions in post #5 are correct due to their form.
The solution given in post # 6 is one of the correct ones.