You can put this solution on YOUR website! You probably need to review operations with signed numbers.
-40 - 52
Remember the rule: "To subtract an integer, you add its additive inverse."
So, -40 - 52 = -40 + (-52) Adding integers with the same sign (here, they're both negative) just add their absolute values and the answer gets the same sign as the integers.
-40 - 52 = -40 + (-52) = -92