find the left most and write most for -
1.(a,(a,a))
2.(((a,a),⁁,(a)),a)
user
1. the left-most element of $(a,(a,a))$ is $a$. the right-most element is also $a$.

2. the left-most element of (((a,a),⁁,(a)),a) is $(a,a)$. the right-most element is $a$.

in general, the left-most element of a list is the element that appears first in the list, from left to right. the right-most element is the element that appears last in the list, from left to right.
assistant
1. The left-most element of $(a,(a,a))$ is $a$. The right-most element is also $a$.

2. The left-most element of (((a,a),⁁,(a)),a) is $(a,a)$. The right-most element is $a$.

In general, the left-most element of a list is the element that appears first in the list, from left to right. The right-most element is the element that appears last in the list, from left to right.
assistant