/ ____________________\ / ____________________\ / ____________________\ / ____________________\ | / ___________ | | / ___________ | | / ___________ | | / ___________ | | / / 2 | | / / 2 | | / / 2 | | / / 2 | | / 1 \/ 1 + 15*n | | / 1 \/ 1 + 15*n | | / 1 \/ 1 + 15*n | | / 1 \/ 1 + 15*n | m*|m + / - - -------------- |*|m - / - - -------------- |*|m + / - + -------------- |*|m - / - + -------------- |*n \ \/ 3 3 / \ \/ 3 3 / \ \/ 3 3 / \ \/ 3 3 /
5 3 3 3 5 - 12*m *n + 8*m *n + 20*m*n
3 / 5 3\ 5 n *\- 12*m + 8*m / + 20*m*n