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![{\displaystyle 1{\bigr )}\ {\Bigl [}a^{2}-b^{2}=y^{2}-z^{2}{\Bigr ]}\ \ \ \ \ 2{\bigr )}\ {\Bigl [}a^{2}-c^{2}=x^{2}-z^{2}{\Bigr ]}\ \ \ \ \ 3{\bigr )}\ {\Bigl [}c^{2}-b^{2}=y^{2}-x^{2}{\Bigr ]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/dbccf8ef8777e2ea479c90ad0cde2c020b65081a)
![{\displaystyle 1st{\bigr )}\ {\Bigl [}a^{2}-b^{2}=y^{2}-z^{2}{\Bigr ]}\ \ \ \ \ 2nd{\bigr )}\ {\Bigl [}a^{2}-c^{2}=x^{2}-z^{2}{\Bigr ]}\ \ \ \ \ 3rd{\bigr )}\ {\Bigl [}c^{2}-b^{2}=y^{2}-x^{2}{\Bigr ]}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/94d5cde34a615f7b59cb53916bbb08e9d2c0af07)
