O inek - inek seks rüyası

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Hakkında

Sonya has a thing for science and all those math formulas, variables and stuff make her so horny she starts shamelessly flirting with her handsome tutor.

Yayınlayan serious12

Video Transcription

Теперь видно, что функция меняет знак при замене косинус x на косинус минус x.

Поэтому воспользуемся, открываем 362-ю страницу.

И в третьем случае, с подстановкой t sin x предварительно подножим

числитель и замени преобразованной подекральной дроби на косинус

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