Answer:
287.919235271
Explanation:
Order of operations:
3 + 5 - 35 + 7 x 5 x 9 - 9 / 7689 x 69
3 + 5 - 35 + 35 x 9 - 9 / 7689 x 69
3 + 5 - 35 + 315 - 9 / 7689 x 69
3 + 5 - 35 + 315 - 0.0807647288334
8 - 35 + 315 - 0.0807647288334
-27 + 315 - 0.0807647288334
288 - 0.0807647288334
287.919235271