In your notebook, set up the following subtraction in a vertical format and select the correct answer. take -4 + 3 a2 from 7 a - a2 . -4 a2 - 7 a - 4 -4 a2 - 7 a + 4 -4 a2 + 7 a + 4 4 a2 + 7 a + 4