Put the Operators in the Equation Maze! : 6 _ 6 _ 3 _ 7 = -8

This brainteaser requires rapid thought and analytical aptitude. You will be presented with an equation with three missing operators. Your mission is to locate the missing operators and complete the equation. It is a terrific method to gauge your knowledge of elementary mathematics and refine your rational faculties. Put your grey cells to work and have a ball!