7) \(-1\frac{1}{4}+\frac{2}{3}\);

\(-1\frac{1}{4}=-\frac{5}{4}\).

\(-\frac{5}{4}+\frac{2}{3}=-\frac{15}{12}+\frac{8}{12}=-\frac{7}{12}\).

Ответ: \(-\frac{7}{12}\).