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দৃশ্যকল্প: ( A= left[ begin array ccc 1+x^ 2 -y^ 2 & 2 x y & -2 y 2 x y & 1-x^ 2 +y^ 2 & 2 x 2 y & -2 x & 1-x^ 2 -y^ 2 end array right] ) | Suva Ai