14. (1000-400):2+30-6-8-10-

(1000 - 400) : 2 + 30 - 6 - 8 - 10 = 600 : 2 + 30 - 6 - 8 - 10 = 300 + 30 - 6 - 8 - 10 = 330 - 6 - 8 - 10 = 324 - 8 - 10 = 316 - 10 = 306