The answer is 2,450. It's really not that hard.
680
The answer = 3510
2 trillion
25x (square) plus 40 plus 15 equals 680.
680 + 440 = 1120
570 ^ 500+70 ^ ^ 250+250+70
2 plus 250 = 252.
The answer = 4590
500 + 680 + 031 ------- 1,211
500
200 + 300 + 150 + 250 = 900