Verified answer

(33+3.7)² : {4.[800 - (9.2+10)²] } =

( 33 + 21 ) ² : { 4 . [ 800 - ( 18 + 10 ) ² ] } =

( 54 ) ² : { 4 . [ 800 - ( 28 ) ² ] } =

( 54 × 54 ) : { 4 . [ 800 - ( 28 × 28 ) ] } =

2916 : { 4 . [ 800 - 784 ] } =

2916 : { 4 . 16 } =

2916 : 64 = 45,56