94!
Use P.E.M.D.A.S to figure this out. It stands for...
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
All you do is follow that order! First, solve the problem in the brackets, which is 23. So now you have 23 x 4 - 5 + 7.
23 x 4 = 92
92 + -5 + -7 is 94.
Hope this helps! Sorry its long. :)