The document contains instructions to solve an equation, inequality, and find values not in a function's domain, as well as find the equation of a circle. It then provides the solutions: the solutions to the equation are -3, -1, 1, 3; the solution to the inequality is -4 <= x < 7; the values not in the function's domain are -9, 9; and the equation of the circle with diameter endpoints (3, -4) and (-1,2) is (x-1)^2 + (y+1)^2 = 13.