Question 363396
{{{(4a+2b-6c)+(3a+2c)=4a+2b-6c+3a+2c=(4a+3a)+2b+(-6c+2c)=7a+2b-4c}}}



So {{{(4a+2b-6c)+(3a+2c)=7a+2b-4c}}}