easy
mid
hard
extra hard
500

2+2


4

500

25x5

125

500

50,000,000+50,000,000

100,000,000,000

500

1,000,000 x 1,000,000

2,000,000,000,000

500

20+20

40

500

50x50

2,500

500

200x2000

400,000

500

9,000,000,000,000+6,000,000,000

9,006,000,000,000

500

50+100-50

100

500

5555+5555

11,110

500

5000x5000

25,000,000

500
29,000,000+500-50

29,000,450

500

1+1=

2

500

259x2

508

500

9999/9

1111

500

(20x20)x300

120,000

500

120+1290

1,410

500

1,000,000+1,000,000

2,000,000

500

1000+1000+55

2,055


500

99,000,000-88,000,000

11