| No TPTP formula. May not be expressible in strict first order. | engineering.kif 154-154 | 子類 微分方程 and 方程 |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 173-173 | 子類 一階微分方程 and 微分方程 |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 178-178 | 子類 高階微分方程 and 微分方程 |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 184-184 | 子類 偏微分方程 and 微分方程 |
| No TPTP formula. May not be expressible in strict first order. | engineering.kif 188-188 | 子類 常微分方程 and 微分方程 |
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