Apply unknownprop_e2cb0de7874d400d74b6cb5cf619af6f48ae813f369fbf388b00f41ca04e606a with
ordsucc,
nat_p,
λ x0 . add_nat 51 x0,
2,
λ x0 x1 . x1 = 61 leaving 4 subgoals.
The subproof is completed by applying nat_ordsucc.
The subproof is completed by applying add_nat_SR with 51.
The subproof is completed by applying nat_2.