Question 337147
Gather like terms 
{{{(2a^2 + 7a- 3) + (4a^2 - 3)=(2a^2+4a^2)+(7a)+(-3-3)}}}
{{{(2a^2 + 7a- 3) + (4a^2 - 3)=6a^2+7a-6}}}