Recently, Ranjit Kumar the resigned from the post of

7.898 × ? + 139.89` ` `-:` 14.23 = 4004.04 – 353.89

` `

? + 539.76 ÷ 5.4 × 94.80 = 9829.54

999.99 + 99.99 + 99= ?

41.78% of 1499 + (9/13) × 389.84 = ?% of 1599.67 + 180.45

What approximate value should replace the question mark?

1 ÷ 8.12 of 255.60 + 66.67% of 150 = ?² - 123.75

√81.02 + 11.836 of 24.98 = ?² + 20.01

(1331)^1/3 x 10.11 x 7.97 ÷ 16.32 =? + 15.022

45.22% of (71.9 x 5.01) + 69.97 =? 

What will come in the place of question mark (?) in the given expression?

?² = {40% of (55² – 35² )} – 44