conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: A tailor purchased buttons for the clothes. She bought 90 green buttons, 10 more yellow buttons than the green buttons, and 5 fewer blue buttons than the green buttons. How many buttons did the tailor purchase?
conversations.from: assistant
conversations.value: The tailor bought 90 + 10 = 100 yellow buttons.
  He also bought 90 - 5 = 85 blue buttons.
  Therefore, The tailor purchased 90 + 100 + 85 = 275 buttons.