Expand this following expression:
7x^2 + 27x - 51
Factorize this expression:
(c + 3d) (c - 7d)
Expand this expression:
-42hk + 18h^2
Expand the following expression:
40 - 66h + 27h^2
Factorize this expression:
3 (p + 2q) (p + 3q)
Factorize this expression:
2 (-k + 5) (2k + 3)
Expand this following expression:
-18a - 5
Factorize this expression
(a - b) (a + 4b)
Factorize this expression:
4 (2f - 3) (f + 3)
Factorize this expression
(-a - 7) (a + 5)