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Ответ:

[tex] \frac{25k - 5k {}^{2} - 5p {}^{2} + 50p }{25pk} = \\ = \frac{25k}{25pk} - \frac{5k {}^{2} }{25pk} - \\ - \frac{5p {}^{2} }{25pk} + \frac{50p}{25pk} = \\ = \frac{1}{p} - \frac{k}{5p} - \\ - \frac{p}{5k} + \frac{2}{k} [/tex]