Apply unknownprop_ce9033a67ef84c6ab0b67c7e947b752573b6048f7ffe5e81030bc8cffa5f9d29 with
4ae4a.. (4ae4a.. (4ae4a.. (4ae4a.. 4a7ef..))),
4a7ef...
The subproof is completed by applying unknownprop_ad3d8dc286672dabbf45d75a5bddff9246ae99a1b47ead9979d5568de89957bd.