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[tex]5\cdot3^{\frac{1}{5}}+2^2\cdot3^{\frac{1}{5}}=5\cdot3^{\frac{1}{5}}+4\cdot3^{\frac{1}{5}}=(5+4)\cdot3^{\frac{1}{5}}=\\\\=9\cdot3^{\frac{1}{5}}=3^2\cdot3^{\frac{1}{5}}=3^{2+\frac{1}{5}}=3^{2\frac{1}{5}}=3^{\frac{11}{5}}[/tex]