YOU SAID:

I find this equation impenetrable

INTO JAPANESE

私はこの方程式は不可解だと思う

BACK INTO ENGLISH

I think this equation is mysterious

INTO JAPANESE

私はこの方程式が不思議だと思う

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I think this equation is strange

INTO JAPANESE

これがそうだな

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This is so.

INTO JAPANESE

これ・・・

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This is so...

INTO JAPANESE

これ・・・

BACK INTO ENGLISH

This is so...