-1/2×-1/2×-1/2×8×8×8/16×16

[tex] \frac{ - \frac{1}{2} \times - \frac{1}{2} \times - \frac{1}{2} \times 8 \times 8 \times 8 }{16 \times 16} \\ = \frac{ { - (\frac{1}{2}) }^{3} \times {8}^{3} }{ {16}^{2} } \\ = \frac{ {( {2}^{ - 1}) }^{3} \times { ({2}^{3}) }^{3} }{ { ({2}^{4}) }^{8}} \\ = \frac{ {2}^{ - 3} \times {2}^{6} }{ {2}^{32} } \\ = \ {2}^{3} \times {2}^{ - 32} \\ = {2}^{ - 29} [/tex]