Remember PEMDAS (Parentheses, Exponents, Multiplication ⇔ Division, Addition ⇔ Subtraction). This is the order that you solve expressions in.
5 * 5 - 4 + 445 * 7 + 41 - 82 Multiply 5 and 5
25 - 4 + 445 * 7 + 41 - 82 Multiply 445 and 7
25 - 4 + 3115 + 41 - 82 Subtract 4 from 25
21 + 3115 + 41 - 82 Add 21 and 3115
3136 + 41 - 82 Add 3136 and 41
3177 - 82 Subtract 82 from 3177
3095