[{"type":"thinking","thinking":"Line 1521:61 — `contDiffOn_mL1b).add contDiffOn_mL2b).add contDiffOn_mIIM).add contDiffOn_const` — count the parens: opening: `(((((((((((contDiffOn_mS _).add` — 11 opens. Closes: after mFblock) 1, mTL1b) 2, mTL2b) 3, mIdb) 4, mL1sqb) 5, mL1L2b) 6, mL2sqb) 7, then `contDiffOn_mL1b)` 8, `contDiffOn_mL2b)` 9, `contDiffOn_mIIM)` 10, then `.add contDiffOn_const` — needs one more close paren for the 11th. And the `.add contDiffOn_const` — the final application has no closing paren — missing `)` at the end. Wait count opens: I count the string `(((((((((((c` = 11 opens for 11 adds after the base? The chain: base contDiffOn_mS then 11 .add's (mFblock, TL1b, TL2b, Idb, L1sqb, L1L2b, L2sqb, L1b, L2b, IIM, const) = 11 adds. Structure ((((((((((base.add A1).add A2)...).add A11: opens before base = 11. Closes needed = 11. Currently: A1..A10 each close one (10 closes), final .add contDiffOn_const — no close — missing 1 `)`. But also the last add's argument: `.add contDiffOn_const` — the const's c metavariable: the goal's last term is `+ mK` — mK is a def (not fun _ => c syntactically) — ContDiffOn.add with contDiffOn_const : ContDiffOn (fun _ => ?c) — unify with the goal's body suffix `+ mK` — the goal function is fun n => (... + mK) — the second summand function := fun _ => mK ✓ c := mK ✓.\n\nAlso 1518 isDefEq timeout — the giant exact with nested adds unifying against the unfolded marginExpanded lambda — heavy but should work once parens are right. Add the missing paren and rebuild. If isDefEq still times out, restructure with `refine` + explicit bullets.","signature":""},{"type":"text","text":"Missing a closing paren in the `contDiffOn_marginExpanded` chain."},{"type":"tool_use","id":"Edit_297","name":"Edit","input":{"file_path":"D:\\Python\\Quantum\\research\\lean\\NguyenRH1\\NguyenRH1\\LiSkeleton.lean","old_string":"  exact ((((((((((contDiffOn_mS _).add (contDiffOn_mFblock F hF)).add\n    contDiffOn_mTL1b).add contDiffOn_mTL2b).add contDiffOn_mIdb).add\n    contDiffOn_mL1sqb).add contDiffOn_mL1L2b).add contDiffOn_mL2sqb).add\n    contDiffOn_mL1b).add contDiffOn_mL2b).add contDiffOn_mIIM).add contDiffOn_const","new_string":"  exact (((((((((((contDiffOn_mS _).add (contDiffOn_mFblock F hF)).add\n    contDiffOn_mTL1b).add contDiffOn_mTL2b).add contDiffOn_mIdb).add\n    contDiffOn_mL1sqb).add contDiffOn_mL1L2b).add contDiffOn_mL2sqb).add\n    contDiffOn_mL1b).add contDiffOn_mL2b).add contDiffOn_mIIM).add contDiffOn_const)"},"extra_content":null}]