| 9   -1
|         | = ( -52 )
| -7   -5

| 5   7
|         | = (   )
| 3   1

| 7   -3
|         | = (   )
| 8   -7

| -3   7
|         | = (   )
| 6   -7

| 7   -6
|         | = (   )
| 8   -7

| 3   -1
|         | = (   )
| -9   -3

| 1   -1
|         | = (   )
| 0   9

 +[         ]

| 0   -9
|         | = ( 36 )
| 4   0

| -5   6
|         | = (   )
| 1   4

| 1   -6
|         | = (   )
| 5   -3

| -6   3
|         | = (   )
| -1   -8

| -7   -5
|         | = (   )
| 4   1

| -7   -2
|         | = (   )
| 8   -2

| -6   -3
|         | = (   )
| -7   6

 +[         ]

| -3   6
|         | = ( 21 )
| -3   -1

| 5   -3
|         | = (   )
| -6   4

| 0   -7
|         | = (   )
| -9   4

| 6   -1
|         | = (   )
| 1   -9

| 9   8
|         | = (   )
| 7   -1

| -2   1
|         | = (   )
| 0   -3

| -2   5
|         | = (   )
| -6   -8

 +[         ]

| -5   -7
|         | = ( 19 )
| 7   6

| -2   0
|         | = (   )
| 3   -1

| -9   4
|         | = (   )
| 1   -8

| 1   8
|         | = (   )
| -8   -1

| 7   -3
|         | = (   )
| -7   2

| -5   -5
|         | = (   )
| -4   5

| -6   7
|         | = (   )
| -1   0

 +[         ]

  ++[[            ]]