Alphabets/Several sets/Exercise

Let ${}LA$ denote the set of capital letters in the Latin alphabet, ${}GA$ the set of capital letters in the Greek alphabet, and ${}RA$ the set of capital letters in the Russian alphabet. Determine the following sets.

1. ${}GA\setminus RA$.
2. ${}{\left(LA\cap GA\right)}\cup {\left(LA\cap RA\right)}$.
3. ${}RA\setminus {\left(GA\cup RA\right)}$.
4. ${}RA\setminus {\left(GA\cup LA\right)}$.
5. ${}{\left(RA\setminus GA\right)}\cap {\left({\left(LA\cup GA\right)}\setminus {\left(GA\cap RA\right)}\right)}$.

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