+(11xy + 7x- 5y) = (y + 13x2 - 4xy)
what goes in the blank where question marks are

There is diarrhea on the floor. what do i do? my mum gonna see that i diarrhea on the floor! * don't report, i'm serious! *

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?