Solution: The original formula =3× (number of roots 4 )× (number of roots 8)÷ (number of roots 16)×6× (number of roots 32).

= 3× (2 )× [4× (2 roots 2) ÷ (4 )× 6× 4 × (2 roots)

=3×2×2 root number 2×6×4 root number 2

=6×6×8× (root number 2) 2

=36×8×2

=36* 16

=576

Therefore, the original formula =576.

The "plus sign or minus sign" in the formula means that the root sign is 4 = 2, but the multiplication (division) of four plus signs or minus signs is equal to (+).

So, in the end, it's all forward operation. Hereby explain.