I need some help with this math problem.. thanks

Answer:
27
Step-by-step explanation:
6-1+5+2+15
5+5+2+15
10+2+15
12+15
27
Use the operation called PEMDAS
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
Go through the equation from p to s
6+-1+5-(-1-1)+15
6-1+5+2+15
5+5+2+15
10+2+15
12+15
27