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0,28(s-t) liczba o 72%...
-2a*(4-a)
(-x... 6x
15ab-6b 3b(5a-2)
3x-4 9x-12/3
5(2a... 8a-26
średnia... x+y+2/3
(2b... -10b2...
4xyz+10xz 2xz...
(9s... 65s...