Final Answer
$x\sin\left(3x\right)+C_0$
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Step-by-step Solution
Problem to solve:
$\int\sin\left(2x+x\right)dx$
Specify the solving method
1
As the integral that we are solving is an indefinite integral, when we finish integrating we must add the constant of integration $C$
$x\sin\left(3x\right)+C_0$
Final Answer
$x\sin\left(3x\right)+C_0$