(5+5⁴)-(x⁴-2)=
(put out the brackets)
=(5+5x⁴)+(-1)(x⁴)+(-2)(-1)=
=5+5x⁴-x⁴+2=
(combine like terms)
=x⁴(5-1)+(5+2)=
=4x⁴+7 is your answer
