What should come in place of the question mark(?) in this question?

(450 ÷ 30)² - (120² = (?)²

What should come in place of the question mark(?) in this question?

3 1/4 + 2 1/2 + 6 1/6 = ?

What should come in place of the question mark(?) in this question?

5554 - 333 + 45 = ? + 2525

What should come in place of the question mark(?) in this question?

(8)² % of ? = 723 + 45

What should come in place of the question mark(?) in this question?

? % of 590 - 11.8 = 236

What should come in place of the question mark(?) in this question?

144  ÷ 8  ÷ ? = 9