Answer:
6?6?6?6?=6 can be 6+(-6)+*6+6which is equal to 6
I MADE ONE OF THE SIXS NEGATIVE SO, IT CAME AS 6+ NEGATIVE 6=0 AND THEN MULTIPLIED ONE SIX SO, 0*6=0 AND THEN FOR THE LAST SIX I MADE IT ADDITION SO, 0+6=6
AND THUS, FINAL ANSWER BECAME 6 ITSELF