What are the four arties?

4 x 4(4-4) = 4 x 40 = 4 x 1 = 4 or 4 + 4(4-4) = 4 + 4(0) = 4 + 0 = 4

Negative Minus Negative = Positive so -4-4= 4 ericrain- No... We have to use 4 fours not 2 fours, so 4+4(4-4)

Four by four or basically 4 x 4, is 16

I have no idea, but my best guess would be it has something to do with braille cave.

Four cubed = 64.