2的-3次方 -(-3分之4)的0次方 + 8的6次方 × 8的-2次方 ÷ 8³
=1/2^3-1+8^6*8^(-2)÷8^3
=1/8-1+8^(6-2-3)
=1/8-1+8
=1/8+7
=7又8分之1