a (3a-4b)
p (4 + q -3r)
s (3t +4u +2v)
q (4pq + 3r + 5pr)
ab (7a + b – 4)
tu 4tu+2uv +3w)
2abc (5c – 2a + 3b)
8qrs (2p+ 7q – 5)
