Te paso los 10 primeros, los demás los puedes hacer tu, saludos
Los conjuntos dados son los siguientes
$$\begin{align}&U={-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}\\&A={-2,-1,0,1,2,3}\\&B={-2,-1,8,9,10,11,12,13,14,15,16,17,18,19,20}\\&C={-2,-1,0,1,2}\\&\end{align}$$
Asi los conjuntos que buscamos son
$$\begin{align}&A∪B={-2,-1,0,1,2,3,8,9,10,11,12,13,14,15,16,17,18,19,20}\\&\end{align}$$
$$\begin{align}&B∪C={-2,-1,0,1,2,8,9 ,10,11,12,13,14,15,16,17 ,18,19 ,20}\end{align}$$
$$\begin{align}&B∩C={-2,-1}\\&\end{align}$$
$$\begin{align}&C∩A={-2,-1,0,1,2}\end{align}$$
$$\begin{align}&A-B={0,1,2,3}\\&\end{align}$$
$$\begin{align}&B-A={8,9,10,11,12,13,14,15,16,17,18,19,20}\\&\end{align}$$
$$\begin{align}&A^'={4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}\\&\end{align}$$
$$\begin{align}&B^'={0,1,2,3,4,5,6,7}\end{align}$$
$$\begin{align}&B∪C^'={3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}\\&\end{align}$$
$$\begin{align}&A∩C={-2,-1,0,1,2} \end{align}$$
Espero haberte ayudado, los otros están sencillos, solo piénsalos un poco