利用广义表的GetHead和GetTail操作写出如上题的函数表达式，把原子[i]banana[/i]分 别从下列广义表中分离出来。（1）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=SDYUKg6nwzI-iZF9Q0c7ag' />=([i]apple[/i]，[i]pear[/i]，[i]banana[/i]，[i]orange[/i]);  （2）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=Q9O_TK45lG5wqxrq98tWeQ' />=(([i]apple[/i]，[i]pear[/i])，([i]banana[/i]，[i]orange[/i]));  （3）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=lEZUyq3Q3n-5jQXA1CyznA' />=((([i]apple[/i])，([i]pear[/i])，([i]banana[/i])，([i]orange[/i])));  （4）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=eEhyMdRH3w5ski1eoHQLWA' />=([i]apple[/i]，([i]pear[/i])，(([i]banana[/i]))，((([i]orange[/i]))));  （5）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=VFT4Ja2BFzu-8sUgo8NL4A' />=(((([i]apple[/i])))，(([i]pear[/i]))，([i]banana[/i])，[i]orange[/i]);  （6）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=LyYpwTNRw5ceNMxR82GmoQ' />=(((([i]apple[/i])，[i]pear[/i])，[i]banana[/i])，[i]orange[/i]);  （7）<img src='https://fb.fenbike.cn/api/planet/accessories/formulas?fontSize=18&latex=zf9aIBR1pqUpD-tpjv_EXg' />=([i]apple[/i]，([i]pear[/i]，([i]banana[/i])，[i]orange[/i]))