I answered a question just now
Given a set S = {x, y, z}, then all the possible subsets of S are
{}, {x}, {y}, {z}, {x, y}, {x, z}, {y, z}, {x, y, z}
where, {} denotes the empty set.
I used all the possible there, and then I realized all of the possible may be better, but I am not so sure.
Similarly, following expressions
expression_1: all the balls in the box
expression_2: all of the balls in the box
Which one (or some other expression) is more idiomatic and clear?
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