Упростите (25-5y^4+y^8)(5+y^4)-y^6(y^6-1)

Question

Упростите (25-5y^4+y^8)(5+y^4)-y^6(y^6-1)

Answer 1

(25-5y⁴+y^8)(5+y⁴)-y^6(y^6-1)
(5+y⁴)(25-5y⁴+y^8)-y^6(y^6-1)
5³+(y⁴)³-y^6(y^6-1)
125+y¹²-y¹²+y^6
125+y^6
y^6+125