Viết gọn lại các kết quả sau :
1) \(\left[\begin{array}{l} \left\{\begin{array}{l} x\geq-2 \\ x< 1 \\ \end{array}\right. \\ x\leq-5 \end{array}\right.\)
2) \(\left\{\begin{array}{l} \left\{\begin{array}{l} x\leq2 \\ x>0 \end{array}\right. \\ \left[\begin{array}{l} x>3 \\ x\leq1 \\ \end{array}\right. \\ \end{array}\right.\)
3) \(\left\{\begin{array}{l} -10<{x}\leq6 \\ -5\leq{x}\leq10 \\ \end{array}\right.\)