The second power of (- 5 / 8) x (- 4) - 0.25x (- 5) x (- 4)
The second power of (- 5 / 8) x (- 4) - 0.25x (- 5) x (- 4)
=-5/8×16-1/4×(-5)×(-64)
=-10-80
=-90
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