Environmental degradation is a big problem of modern

215 + 378 – 23 + 15 - 27 = ? + 3² + 16²

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

737 + 149 - ?²- 367 = 14 X 25

458.32-563.32+659.32=?

[4(1/3) + 4(1/4)] × 24 – 62 = ?²

8⁹ ÷ 512 × (1/64) = (2³)^?

(286 ÷ 11 + 14) × 5 = 40 + 25% of ?

46.2 × 8.4 × 3 + ? = 1200

`(21 xx 51 + 54)/(9 xx 14 - 30 )` =?

25% of 140 + 2 × 8 = ? + 9 × 5

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

(2/3 of 351) + (40% of 220) = ?