2500 - { 250 : 5 + 15 : 5 x [305 - (50 : 25 + 2 ) x 75 ] x 150}= 200
= 2 500 - { 50 + 3 × [ 305 - ( 2 + 2 ) × 75 ] × 150 } =
= 2 500 - [ 50 + 3 × ( 305 - 4 × 75 ) × 150] =
= 2 500 - [ 50 + 3 × ( 305 - 300) × 150 ] =
= 2 500 - ( 50 + 3 × 5 ×150 ) =
= 2 500 - ( 50 + 2 250) =
= 2 500 - 2 300 =
= 200