 + 2 × 5
 + 2 × 5
To evaluate apply the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction) 
Parentheses 
There are none for this steps so go on to the next step
Exponent:

81
so...
81 + 2 × 5 
Multiplication: 
81 + 2 × 5
2 × 5
10
so...
81 + 10
No division in this equation so skip this step and go to the next one
Addition:
81 + 10
91
Hope this helped!
~Just a girl in love with Shawn Mendes