Question

add (7+9a-7b),(2b+4a-6)​

Answer 1

$\huge\underline\mathfrak\pink{Answer}$

$(7 + 9a - 7b) + (2b + 4a - 6) \\ 7 + 9a - 7b + 2b + 4a - 6 \\ 9a + 4a - 7b + 2b + 7 - 6 \\ 13a - 5b + 1$

Answer 2

I write only answer

13a-5b+1