Find the Missing Operators in the Equation! : 6 _ 6 _ 9 _ 9 = -5

This conundrum necessitates fast thinking and problem solving capabilities. You'll be presented with a formula with three operators missing. Your job is to discover the missing operators and finish the formula. It is a marvelous way to assess your familiarity with core math operations and hone your cognitive abilities. Get ready to use your intellect and have a blast!