ml2/30ml2/3ml2/3
| ml2/120ml2/12ml2/12
| (l2/3 + h2/12)mmh2/12Ml2/3(h2/12+l2/3)m
| ([h2+l2]/12)mMh2/12Ml2/12([h2+l2]/12)m
| mR2/2mR2/4mR2/4mR2/2
| MR2MR2/2MR2/2MR2
| M(R2/4 + l2/12)MR2/2M(R2/4 + l2/12)M(R2/4 + l2/12)
| M(R2/4 - l2/6)MR2/2M(R2/4 - l2/6)M(R2/2 - l2/6)
| 2MR2/52MR2/52MR2/53MR2/5
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