Scenario 1

List transforms and concatenation (reverse/slice/take-drop/split-at/concat/concat-map/flatten)

Scenario 2

Curried function application helpers (apply/curry/flip/over/id/is-type/replicate)

Scenario 3

Predicate-driven list splits (take-while/drop-while/span/break-list)

Scenario 4

Aggregations and folds (fold*/sum/product/mean/any/all/and-list/or-list/maximum/minimum)

Scenario 5

Number theory and integer arithmetic edges (gcd, lcm, mod/quot/div semantics)

Scenario 6

Set-style deduping and grouping (unique/unique-by/difference/intersection/union/count-by/group-by)

Scenario 7

List slicing and positional helpers (head/first/tail/last/initial/at/empty)

Scenario 8

List iteration and filtering (each/map/filter/reject/compact/partition/find)

Scenario 9

Numeric primitives and rounding (negate/abs/signum/division variants/pow-exp-sqrt-ln/trig/rounding/is-it-NaN/parity)

Scenario 10

Fixed-point recursion and memoization combinators (fix, memoize)