This software is made for the purpose of acquiring the expanded result of "-2a5b4d-2a5b2d+20a4b2c+20a4b4c-2a3b2d-2a3b4d-2a3b3-2a3b+20a2b4c+20a2b2c-2ab3-2ab?h,
when (20a2b2c-2a3b2d-2ab)(a2+1)(b2+1) is set.
Accordingly this software is made for the purpose of acquiring an expansion of an equation.
And the acquired equations can be added or expanded by files-works each other.
The straight line?fs equation passing several points on XY-plane or 3-dimension and having minimum distance were showed on the document of "About equation software".
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