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[[itemVal]]
數學 Porn - 165 Videos
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HD
528.40K
[重生][真・Pronhub 最大華人微積分教學頻道] 微分應用篇重點五：漸近線｜精選範例 5-2｜數學老師張旭
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Mathematics teacher ends up fucking me in the school parking lot for a grade
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大學生沒交過男友被內射無數次，對～都是我❤️
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[復甦][真・Pronhub 最大華人微積分教學頻道] 極限篇重點一：極限的直觀定義｜精選範例 1-1｜數學老師張旭
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[研究生][師生戀][不倫戀][口交][騎乘位]【張旭微積分】微分篇主題七：微分工具整合 | 精選範例 7-2 | 2020 版
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認真教一下分離變數法｜張旭工程數學｜微分方程篇｜主題二：分離變數法
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[重啟][真・Pronhub 最大華人微積分教學頻道] 微分篇重點一：導數與微分的概念｜精選範例 1-5｜數學老師張旭
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[重啟][真・最大華人微積分教學頻道] 微分篇重點七：微分工具整合｜精選範例 7-3｜數學老師張旭
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[復甦][真・Pronhub 最大華人微積分教學頻道]連續篇｜重點一：連續的概念｜精選範例 1-1｜數學老師張旭
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[hentai][milf][lesbian] changhsumath｜Calculus｜Sequence & Series｜1｜Sequence & its Limit
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[復甦][真・Pronhub 最大華人微積分教學頻道] 連續篇重點三：極限和連續的聯手｜觀念講解｜數學老師張旭
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[重啟][真・Pronhub 最大華人微積分教學頻道] 微分篇重點三：微分合成律 (連鎖律)｜精選範例 3-3｜數學老師張旭
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對，我復活了，但別只訂閱這裡，還有我的 B 站：數學老師張旭
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認真教一下可化正合型｜張旭工程數學｜微分方程篇｜主題五：可化正合型
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[重啟][真・Pronhub 最大華人微積分教學頻道] 微分篇重點六：萊布尼茲微分符號與隱函數微分法｜精選範例 6-2｜數學老師張旭
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[復甦][真・最大華人微積分教學頻道] 極限篇重點三：一些基本函數的極限 (中集)｜觀念講解｜數學老師張旭
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[火爆][偷情][師生戀][內褲][做愛]【張旭微積分】微分篇主題八：切線專論 | 精選範例 8-3 | 2020 版
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[重啟][真・最大華人微積分教學頻道]微分篇重點一：導數與微分的概念｜補充教材｜數學老師張旭
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[復甦][真・最大華人微積分教學頻道] 極限篇重點十之一：老大比較法 (上)：多項式分式｜精選範例 10-1-2｜數學老師張旭
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【自拍】【家教】張旭微積分｜極限篇｜主題九：含無窮符號之極限｜精選範例 9-2｜數學老師張旭｜hentai｜massage｜amateur｜black
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[復甦][真・Pronhub 最大華人微積分教學頻道] 連續篇重點一：連續的概念｜觀念講解｜數學老師張旭
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【台灣】【中年男子】張旭微積分｜極限篇｜主題二：極限的直觀定義｜觀念講解｜數學老師張旭｜black｜step mom｜joi｜anime｜latina
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復甦真・pronhub 最大華人微積分教學頻道 🎯 張旭微積分｜極限篇｜重點八：高斯符號求極限｜精選範例 8-2｜數學老師張旭
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[黑人][露出][無碼][無料]【張旭微積分】連續篇主題一：連續的概念 | 精選範例 1-1 | 2020 版
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【高清】【經典】張旭微積分｜極限篇｜主題十之二：老大比較法(中)：指數函數分式 ｜觀念講解｜數學老師張旭｜step mom｜korean｜milf｜anime
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[潮吹][噴稅][因地][內褲][御姐[【張旭微積分】微分篇主題三：微分合成律 (連鎖律) | 精選範例 3-1 | 2020 版
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認真教一下微分方程的產生｜張旭工程數學｜微分方程篇｜主題一：微分方程的產生
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【大學生】【興奮】張旭微積分｜極限篇｜重點四：極限運算定理 (四則運算篇)｜精選範例 4-3｜數學老師張旭｜
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[復活][真・最大華人微積分教學頻道] 微分應用篇重點四：微分求極值法｜觀念講解｜數學老師張旭
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[復甦][真・最大華人微積分教學頻道] 極限篇重點二：極限的嚴格定義｜觀念講解｜數學老師張旭
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[Amateur][Plump][Uncensored] changhsumath｜Calculus｜Sequences&Series｜2｜O.P. of sequence limits
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認真教一下可化成變數可離型｜張旭工程數學｜微分方程篇｜主題三：可化成變數可離型
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[復甦][真・最大華人微積分教學頻道] 連續篇重點四：中間值定理｜觀念講解｜數學老師張旭
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[重啟][真・Pronhub 最大華人微積分教學頻道] 微分篇重點一：導數與微分的概念｜精選範例 1-1｜數學老師張旭
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[重啟][真・Pronhub 最大華人微積分教學頻道] 微分篇重點六：萊布尼茲微分符號與隱函數微分法｜精選範例 6-1｜數學老師張旭
10:15
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