[27x25-63x2x3+(426:3+4xp):2]:4x6=714
[675-378+(142+4×p):2]:4 = 714:6
[675-378+(142+4×p):2]:4 = 119
[675-378+(142+4×p):2] = 119×4
297+(142+4×p):2 = 476
(142+4×p):2 = 476-297
(142+4×p):2 = 179
(142+4×p) = 179×2
142+4×p = 358
4×p = 358-142
4×p = 216
p = 216:4
p = 54