Applies a function to list elements as arguments.
f @@ expr or Apply[f, expr]
Apply[f, expr, levelspec]
Apply[f]
Apply[Plus, {1, 2, 3}]
→ 6Apply[Times, {2, 3, 4}]
→ 24{Apply[f, g[x][y]], Apply[f, g[x][y][z]]}
→ {f[y], f[z]}{Apply[f, a -> b, {0}], Apply[f, a == b, {0}]}
→ {f[a, b], f[a, b]}