3,44 + (0,9 : 0,45)^2 - 2,4 * 0,6

1. Calculate the division inside the parentheses: 0,9 / 0,45 = 2.
2. Square the result: 2^2 = 4.
3. Calculate the multiplication: 2,4 * 0,6 = 1,44.
4. Perform the addition and subtraction: 3,44 + 4 - 1,44 = 6