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B<-10, -9, -7, -2, 0, 1, 2, 7, 8,>
A∨B={ -10, -9, -7, -5, -4, -3, -2, 0, 1, 2, 5, 7, 8, 9 }
A,B={ -2, 0, 1, 2, 7, 8 }
A - B={ -5, -4, -3, 5, 9 }
A∧B=(_2,0,1,2,7,8,)a częśc wspóln z A
a/B=(-5,-4,-3-9)A rózne od B