Answer:
21
Explanation:
Use PEMDAS
P ---> Parenthesis
E ----> Exponents
M & D -------> Multiplication & Division
A & S ------> Addition & Subtraction
5 + 4*(8 - 6)² = 5 + 4*(2)²
= 5 + 4*4
= 5 + 16
= 21
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