( 7⁴ - 7³ ) : ( 7² - 7 ) - 2³ × 5 =
( 2 401 - 7³ ) : ( 7² - 7 ) - 2³ × 5 =
( 2 401 - 343 ) : ( 7² - 7 ) - 2³ × 5 =
2 058 : ( 7² - 7 ) - 2³ × 5 =
2 058 : ( 49 - 7 ) - 2³ × 5 =
2 058 : 42 - 2³ × 5 =
49 - 2³ × 5 =
49 - 8 × 5 =
49 - 40 =
9 → rezultatul final
☆ 7⁴ = 7 × 7 × 7 × 7 = 2 401
☆ 7³ = 7 × 7 × 7 = 343
☆ 7² = 7 × 7 = 49
☆ 2³ = 2 × 2 × 2 = 8