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If d(1),d(2) (d(1)>d(2)) denote the leng...

If `d_(1)`,`d_(2)` (`d_(1)`>`d_(2)`) denote the lengths of the perpendiculars from the point (2,3) on the lines given by `15x^(2)+31xy+14y^(2)=0`, then `d_(1)^(2)`- `d_(2)^(2)`+`(1)/(74)`+`(1)/(13)` is equal to

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