Subtract:
`5a^2+7ab-2b^2+4` from `7a^2-ab+2b^2`

Subtract: 2a^2 from -7a^2

Subtract : a^(2) + ab + b^(2) from 4a^(2) - 3ab + 2b^(2)

Subtract: a^2-3a b from 2a^2-7a b

Subtract 3a^2-5a+6b-8 from 2a^2+4a+7ab+1

Subtract : -1/2 ab " from " -2/3 ab

Subtract: 2a-b from 3a-5b

(a) Subtract 4a-7ab+3b+12 from 12a-9ab+5b-3 (b) Subtract 3xy+5yz-7zx from 5xy-2yz-2zx+10xyz (c) Subtract 4p^2q-3pq+5pq^2-8p+7q-10 from 18-3p-11q+5pq-2pq^2+5p^2q

Subtract : 3ab - 2bc + 5ca " from " 2ab + 3bc - 7ca

Subtract : 3a - 5b + c + 2d from 7a - 3b + c - 2d

Factorise : 5a^(2) - b^(2) - 4ab + 7a - 7b