48) \((2x^2+m^5)^2=\)

\((2x^2+m^5)^2=(2x^2)^2+2\cdot2x^2\cdot m^5+(m^5)^2=4x^4+4x^2m^5+m^{10}\).

Ответ: \(4x^4+4x^2m^5+m^{10}\).