Which one will replace the question mark?

and (6 x 7 x 5)/10 = 21

Therefore (4 x 8 x 10)/10 = 32.

Therefore, (4)³ = 64.

and 39 + 46 = 85

Therefore, 16 + 83 = 99.

and (28 + 12) = (10 + 30)

Therefore (29 + 16) = (15 + 30).

and (4 x 4) + (5 x 7) = 51

Therefore, (3 x 4) + (5 x 5) = 37.

(8)² = 64

(5)² = 25

(1)² = 1.

and (16)² - (7)² = 207

Therefore (25)² - (21)² = 184.

(3)² + (9)² = 90

Therefore, (1)² + (5)² = 26.

(789 - 543) = 246

(863 - 241) = 622.