Question

500045-415498:83+616528 :(21851 -21763)

Answer 1

21851-21763=712
415498:83=5006
500045-5006=45039
45039+616528=661567

Answer 2

500045-415498:83+616528:(21851-21763)=502045
1) 21851-21763=88
2) 415498:83=5006
3) 616528:88=7006
4) 500045-5006=495039
5) 495039+7006=502045