Lost a 1d, I am not sure why

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Hello. I am not sure about my opening, and I voluntarily let white play some moves on the right side, thinking that it was small because of the joseki of the lower right corner. But I think losing the group here was big … Was it game over already, what mistakes did I make before that, how could I have improved the rest of the game ? Thank you in advance.

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reviewed left general comments let me know if you have any questions.

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