2tan−1(x+3)+c2 \tan ^{-1}(\sqrt{x+3})+c2tan−1(x+3)+c
In(x+x+3)\operatorname{In}(x+\sqrt{x+3})In(x+x+3)
2x+3+c2 \sqrt{x+3}+c2x+3+c
In(x+3)+c\operatorname{In}(\sqrt{x+3})+cIn(x+3)+c