Question 1001026
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{{{log((x+3))}}} + {{{log((x+4))}}} = {{{log((x^3+13x^2))}}} - {{{log(x)}}}     ----->


{{{(x+3)*(x+4)}}} = {{{(x^3+13x^2)/x}}},


(x+3)*(x+4) = x^2 + 13x.


Solve yourself this equation and complete your assignment.


At the end check that your solution is in the domain where all original functions are defined.


Good luck!