5 m-n=3m +4n then find the values of the following expressions.
1 . m² +n²/m2-n2
2 . 3m+4n
3m-4n
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No list of flightless birds would be complete without the penguin. All 18 species of penguin are unable to fly, and are in fact better built for swimming and diving, which they spend the majority of their time doing. Their short legs and stocky build give them a distinctive waddling walk.
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