Ok so do u know how to use pemdas so the p stands for parentheses the e stands for exponents the M stand for multiplying the D stand for dividing the a stands for addition and the S stand for subtraction so the first step is to do the exponent so 3 times 3 times 3 wich gives u 9 so now ur next step would be to TO multiply 5 times 4 wich is 20 so ur equation would be like this 20+9-15 divided by 5 so ur next step is to divide 15 divided by 5 wich is 3 so ur final equation would look like this 20+9-3 now solve that and that's ur answer hope this helped