If we use the recursive equation to calculate, we need to write the simple calculation process. 42 △ [14 - (50-39)] 7.25 × 1.8 + 27.5 × 0.18905 × 99 + 905

If we use the recursive equation to calculate, we need to write the simple calculation process. 42 △ [14 - (50-39)] 7.25 × 1.8 + 27.5 × 0.18905 × 99 + 905

42 ^ [14 - (50-39)] = 42 ^ (14-11) = 42 ^ 3 = 14; 7.25 × 1.8 + 27.5 × 0.18 = 7.25 × 1.8 + 2.75 × 1.8 = 1.8 × (7.25 + 2.75) = 1.8 × 10 = 18; 905 × 99 + 905 = 905 × 99 + 905 × 1 = 905 × (99 + 1) = 905 × 100 = 90500