Simplificati urmatoarele fractii pana obtineti fractii ireductibile:

a)
[tex] \frac{2 {}^{50} + 2 {}^{50} }{2 {}^{52} } [/tex]
b)
[tex] \frac{7 \times 2 {}^{50} + 3 \times 2 {}^{51} }{4 \times 3 {}^{50} + 3 {}^{52} } [/tex]
c)
[tex] \frac{3 {}^{n} + 2 \times 3 {}^{n + 1} + 3 {}^{n + 2} }{2 \times 5 {}^{n} + 5 {}^{n + 1 } + 5 {}^{n + 2} } [/tex]