(f((x when e),val(e))) ~ map((p.2of(p)) o (x@0.<tg,x@0>);f (f((x when e),val(e))) ~ map((p.2of(p)) o (x@0.<tg,x@0>);((x when e)
(f((x when e),val(e))) ~ map((p.2of(p)) o (x@0.<tg,x@0>);,val(e)))
2 steps
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