\nthroot{11}{7^{51}}

\nthroot{5}{7^{18}}

\nthroot{9}{7^{33}}

\nthroot{6}{x^{32}}

\nthroot{20}{y^{65}}

\nthroot{9}{7^{41}}

\nthroot{17}{y^{22}}

\nthroot{19}{7^{110}}

\nthroot{12}{7^{43}}

\nthroot{4}{y^{8}}

\nthroot{18}{7^{101}}

\nthroot{17}{x^{28}}

\nthroot{13}{3^{65}}

\nthroot{15}{3^{67}}

\nthroot{15}{y^{73}}

\nthroot{13}{y^{64}}

\nthroot{6}{x^{28}}

\nthroot{19}{7^{110}}

\nthroot{15}{y^{56}}

\nthroot{11}{y^{35}}

\nthroot{10}{x^{20}}

\nthroot{19}{x^{69}}

\nthroot{8}{y^{25}}

\nthroot{7}{3^{14}}