Answer: \(A'\cap B\); \((X\cap Y)\cup(X\cap Z)\).

For the first diagram, the shaded region is inside \(B\) but outside \(A\). This is

\(A'\cap B.\)

For the second diagram, the shaded region is the part of \(X\) that overlaps with \(Y\) or with \(Z\). This is

\((X\cap Y)\cup(X\cap Z).\)

Equivalently, this can be written as \(X\cap(Y\cup Z)\).