$$ \hspace*{6 mm}\mathrm{1.\kern2mm\ ac + ad + bc + bd } $$
[ Vraag 1. ]
$$ \hspace*{6 mm}\mathrm{2.\kern2mm\ ac - ad - bc + bd } $$
[ Vraag 2. ]
$$ \hspace*{6 mm}\mathrm{3.\kern2mm\ mp - mq + np - nq } $$
[ V 3. ]
$$ \hspace*{6 mm}\mathrm{4.\kern2mm\ px + py - qx - qy } $$
[ V 4. ]
$$ \hspace*{6 mm}\mathrm{5.\kern2mm\ ax + ay - bx - by } $$
[ V 5. ]
$$ \hspace*{6 mm}\mathrm{6.\kern2mm\ ax - ay - bx + by } $$
[ V 6. ]
$$ \hspace*{6 mm}\mathrm{7.\kern2mm\ 2ax + 2ay - 3bx - 3by } $$
[ V 7. ]
$$ \hspace*{6 mm}\mathrm{8.\kern2mm\ 3am - 3an 4bm - 4bn } $$
[ V 8. ]
$$ \hspace*{6 mm}\mathrm{9.\kern2mm\ 3ap - aq + 6bp + 3bq } $$
[ V 9. ]
$$ \hspace*{4 mm}\mathrm{10.\kern2mm\ 2px + py - 6qx - 3qy } $$
[ V 10. ]
$$ \hspace*{4 mm}\mathrm{11.\kern2mm\ 10ap - 2aq - 15bp + 3bq } $$
[ V 11. ]
$$ \hspace*{4 mm}\mathrm{12.\kern2mm\ 4px - 5py - 12qx + 15qy } $$
[ V 12. ]
$$ \hspace*{4 mm}\mathrm{13.\kern2mm\ 2ax + 6ay - 5bx - 15by } $$
[ V 13. ]
$$ \hspace*{4 mm}\mathrm{14.\kern2mm\ 15ay - 21az - 10by + 14bz } $$
[ V 14. ]
$$ \hspace*{4 mm}\mathrm{15.\kern2mm\ 2a^2x + 8ac - 3abx - 12bc } $$
[ V 15. ]
$$ \hspace*{4 mm}\mathrm{16.\kern2mm\ 2px + 6qx - py - 3qy } $$
[ V 16. ]
$$ \hspace*{4 mm}\mathrm{17.\kern2mm\ 6a^2m - 15an + 8abm - 20bn } $$
[ V 17. ]
$$ \hspace*{4 mm}\mathrm{18.\kern2mm\ 8px + 20p^2q - 6qx - 15pq^2 } $$
[ V 18. ]
$$ \hspace*{4 mm}\mathrm{19.\kern2mm\ 10m^2p - 35mnq - 6mnp + 21n^2q } $$
[ V 19. ]
$$ \hspace*{4 mm}\mathrm{20.\kern2mm\ 10a^2b + 16ab^2d + 15ac + 24bcd } $$
[ V 20. ]
$$ \hspace*{4 mm}\mathrm{21.\kern2mm\ am = an + ap + bm - bn + bp } $$
[ V 21. ]
$$ \hspace*{4 mm}\mathrm{22.\kern2mm\ ap - aq + ay - bp + bq - by } $$
[ V 22. ]
$$ \hspace*{4 mm}\mathrm{23.\kern2mm\ ax + bx - cx + 3a + 3b - 3c } $$
[ V 23. ]
$$ \hspace*{4 mm}\mathrm{24.\kern2mm\ ay + 2by - 4y - 3a - 6b + 12 } $$
[ V 24. ]
$$ \hspace*{4 mm}\mathrm{25.\kern2mm\ ax - mx + nx - 2a^2 + 2am + 2an } $$
[ V 25. ]
$$ \hspace*{4 mm}\mathrm{26.\kern2mm\ 3pm - 4mq + 5m - 6np + 8nq - 10n } $$
[ V 26. ]
$$ \hspace*{4 mm}\mathrm{27.\kern2mm\ 2x^2 - 6xy + 10xz + 3x - 9y + 15z } $$
[ V 27. ]
$$ \hspace*{4 mm}\mathrm{28.\kern2mm\ 2a^2 + 3ac - 4a + 4ab + 6bc - 8b } $$
[ V 28. ]
$$ \hspace*{4 mm}\mathrm{29.\kern2mm\ 6m^2 + 21mn - 15mq - 4mn - 14n^2 + 10nq } $$ $$ \hspace*{12 mm}\mathrm{=\ 6m^2 + 17mn - 15mq - 14n^2 + 10nq } $$
[ V 29. ]
$$ \hspace*{4 mm}\mathrm{30.\kern2mm\ 10x^2 + 15xy - 20x - 4xy - 6y^2 + 8y } $$ $$ \hspace*{12 mm}\mathrm{=\ 10x^2 + 11xy - 20x - 6y^2 + 8y } $$
[ V 30. ]