-1 -4+3[-2+4(2times 5)-20]+(5times 4)

To solve the expression \(-1\{ -4+3[-2+4(2\times 5)-20]+(5\times 4)\} \), follow these steps:1. Calculate inside the innermost parentheses: .2. Substitute back into the expression: 3. Simplify inside the brackets: 4. Substitute back into the expression: 5. Calculate the multiplication and addition: 6. Substitute back into the expression: 7. Simplify inside the braces: 8. Apply the outer multiplication by : The final result is .