Question

4 номерка решите пж.

Answer 1

$\frac{7m+n^{4} }{3n}-\frac{7m-2n^{4} }{3n}=\frac{7m+n^{4}-7m+2n^{4}}{3n}=\frac{3n^{4}}{3n}=\frac{3n*n^{3} }{3n}=n^{3}\\\\Otvet:\boxed{n^{3}}$