Q: he considered three discs r, s, and t as typical subsets of a set u. the intersections of these discs and their complements divide u into 8 non-overlapping regions, the unions of which give 256 different boolean combinations of the original sets r, s, t.
A: He considered three discs R, S, and T as typical subsets of a set U. The intersections of these discs and their complements divide U into 8 non-overlapping regions, the unions of which give 256 different Boolean combinations of the original sets R, S, T.

Q: the competition grab the other hand often or only on price lists.
A: The competition grab the other hand often or only on price lists.

Q: among the species names there is a lot of confusion, not eliminate so far.
A: Among the species names there is a lot of confusion, not eliminate so far.

Q: 0.6 other calculated expenditure
A:
0.6 Other calculated expenditure