Find the integral of $1+111$ using the table of common integrals rule $\int a\mathrm{d}x=ax$.
$$\left(1+111\right)x$$
Simplify.
$$112x$$
If $F\left(x\right)$ is an antiderivative of $f\left(x\right)$, then the set of all antiderivatives of $f\left(x\right)$ is given by $F\left(x\right)+C$. Therefore, add the constant of integration $C\in \mathrm{R}$ to the result.
