1.5(0.781) - 9(0.9) - (0.9 + 1.5(0.781))
= 1.1715 - 8.1 - (0.9 + 1.1715)
= 1.1715 - 8.1 - 0.9 - 1.1715
= -6.8285

Therefore, the result is -6.8285.