3(5^2 + 5) - 42/ 4 + 1 use PEMDAS in the paraenthesis there is an exponent do that first
3(25 + 5) - 42/ 4 + 1 next parenthesis
3*30 - 42/4 + 1 multiplication and division left to right across the line
90 - 10.5 + 1 addition and subtraction across the line
80.5