Whats the answer

Solution

1

 

Simplify 40+140+1 to 4141

40×412−4040×412−40

 

2

 

Simplify 40×41240×412 to 1640216402

16402−4016402−40

 

3

 

Simplify 1640216402 to 820820

820−40820−40

 

4

 

Simplify

780780

 

Done