Math Help - Help with finishing problem. Multiplying powers

1. Help with finishing problem. Multiplying powers

$g(x)= (3+4x)^5*(3+x-x^2)^6$
$g'(x)=5(3+4x)^4(4) *(3+x-x^2)^6 + 6(3+x-x^2)^5(1-2x)*(3+4x)^5$
Please explain steps of how to finish this

2. Try to factorise what is common to simplify.

There is the (3+4x) and (3+x-x^2) which are common.

3. answer
$(3+4x)^4 (3+x-x^2)^5 (78+8x-68x^2)$

4. Well done!