v= (P2 - p1)_t
v= (P2 - p1)_t a song by Z'ev on Songsofy
z = -(Es+E3 )
by
Z'ev
,
e = v～z!uEv～z
by
Z'ev
,
v= (P2 - p1)_t
by
Z'ev
,
Z = √ x2_1 + x2_2 + x2_3
by
Z'ev
,
e = z^4
by
Z'ev
,
V2 = u2- 2
by
Z'ev
,
