| 1. |
Expand along row 2.
 | | -15 | 9 | -19 | | 16 | 10 | 6 | | 5 | -13 | -18 |
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| 2. |
Expand along column 2.
 | | -11 | 3 | 10 | | 19 | 2 | -4 | | -8 | -10 | 20 |
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| 3. |
Expand along column 2.
 | | -8 | 14 | -16 | | 1 | 6 | 18 | | -14 | 20 | 12 |
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| 4. |
Expand along column 2.
 | | 20 | -19 | 8 | | 12 | 14 | -4 | | 4 | 15 | -12 |
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| 5. |
Expand along row 3.
 | | -10 | 16 | 7 | | -9 | 9 | 14 | | -11 | -13 | -7 |
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| 6. |
Expand along row 1.
 | | 12 | 20 | -17 | | 11 | -6 | -12 | | 1 | -9 | -20 |
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| 8. |
Expand along row 3.
 | | -15 | 18 | 11 | | -8 | 12 | -6 | | -17 | 8 | 5 |
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| 9. |
Expand along row 3.
 | | 14 | 6 | -20 | | 13 | 11 | 8 | | -15 | 9 | -12 |
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| 10. |
Expand along column 1.
 | | 15 | -16 | -5 | | 19 | -3 | 2 | | 16 | 12 | 7 |
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| 11. |
Expand along row 1.
 | | 16 | -3 | 15 | | 19 | -10 | -4 | | -5 | -1 | 14 |
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| 13. |
Expand along column 3.
 | | -1 | 19 | 4 | | -12 | -5 | -19 | | -4 | -15 | 8 |
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| 14. |
Expand along row 3.
 | | -16 | 0 | -5 | | -8 | 16 | 20 | | 12 | -11 | 1 |
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| 16. |
Expand along row 3.
 | | 15 | -15 | 16 | | 9 | -6 | -11 | | 1 | -7 | 13 |
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| 17. |
Expand along column 1.
 | | 0 | 1 | 4 | | -20 | -13 | 16 | | -6 | 14 | -1 |
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| 18. |
Expand along column 1.
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| 19. |
Expand along column 3.
 | | -2 | -13 | -18 | | -10 | -8 | -9 | | 0 | -17 | -16 |
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| 20. |
Expand along column 2.
 | | 4 | 12 | 10 | | -7 | 13 | -4 | | -8 | -12 | 8 |
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| 21. |
Expand along column 3.
 | | 14 | 0 | -14 | | -8 | -17 | -2 | | -9 | -19 | -10 |
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