[tex]A=[-3,~+\infty) \\
B=[-5,~7) \\
C = \{1,~2,~3\} \\ \\
A\bigcup B=[-5,~+\infty) \\ A \bigcap B =[-3,~7) \\ A \bigcup C = A ~~deoarece~~ C \subset A\\
A \bigcap C =C ~~deoarece~~ C \subset A \\ B \bigcup C = B ~~deoarece~~ C \subset B \\
B \bigcap C = C ~~deoarece~~ C \subset B [/tex]