For both of these questions, we have to use PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. This is the order that we need to do things.
1.)
(1 x 2) x 3^2 x 4 + 5
Parentheses - multiplication
2 x 3^2 x 4 + 5
Exponents
2 x 9 x 4 + 5
Multiplication
72 + 5
Addition
77
2.)
8 + 6 x 3 x 4 x 8
Multiplication
8 + 576
Addition
584