tolong bantu plisss yang bener

(4p-5q)^5
Segitiga pascal 1 5 10 10 5 1
4^5p^5-5.4⁴.5.p⁴q+10.4³.5²p³q²-10.4².5³.p²q³+5.4.5⁴pq⁴-5^5q^5
=1024p^5-6400p⁴q+16000p³q²-20000p²q³+12500pq⁴-3125q^5