(a⁴-3a-12)-(3a⁴-2a-7) 6x⁴(4y-2x²)

Question

(a⁴-3a-12)-(3a⁴-2a-7)
6x⁴(4y-2x²)

Answer 1

(a⁴-3a-12)-(3a⁴-2a-7)=a⁴-3a-12-3a⁴+2a+7=-2а⁴-а-5
6x⁴(4y-2x²)=24х⁴у-12х^8