Time Warp Bonus Puzzle!

Monthly Mystery by The Escape Game

4 IS THE ULTIMATE NUMBER

4 IS ALL THINGS

ALL THINGS LEAD TO 4

IF 4 IS THE MAGIC NUMBER, THEN…

7 = 5 = 4

7,243 = 33 = 11 = 6 = 3 = 5 = 4

21 = 9 = 4

-2 = 11 = 6 = 3 = 5 = 4

HOW DOES 67 LEAD TO 4?

(FOR THE ANSWER, USE NUMBERS AND = ONLY)

(EXAMPLE: X=X=X=X=X)