Here is some bug, because I have 3 error that 729 should equal 7625597484987 it is x=3 y=10 , I checked it in other ide and my solution works ;) And rest test pass :P

By convention, we insert parentheses from right to left

3^3^3 = 3^(3^3) = 3^27

not

(3^3)^3 = 27^3