Can I put a small breaker box on a/c line then run a line off that to table saw 75 feet awayand the other breaker to a/c unit. Saw is 3 hp 220 v single phase 18 amp a/c is on 50 amp breaker a/c unit is 26.4 amps if not what size wire and breaker would I need to run a new line from main breaker box that's 225 feet from saw thanks kevin

Start this the easy way, if eitther the A/C or the Saw require a dedicated circuit, than the answer is no!

Resolve that issue and then get back to us.