∫ − 2 2 ( 3 u + 1 ) 2 d u ∫ 3 u 2 + 6 u + 1 d u 3 u 3 + 3 u 2 + u | − 2 2 3 ⋅ 2 3 + ⋅ 2 2 + 2 − 3 ⋅ − 2 3 + 3 ⋅ − 2 2 − 2 {\displaystyle {\begin{aligned}&\int _{-2}^{2}({3u+1})^{2}du\\[2ex]&\int {3u^{2}+6u+1}du\\[2ex]&{3u^{3}+3u^{2}+u}{\bigg |}_{-2}^{2}\\[2ex]&{3\cdot 2^{3}+\cdot 2^{2}+2-3\cdot -2^{3}+3\cdot -2^{2}-2}\end{aligned}}}
![{\displaystyle {\begin{aligned}&\int _{-2}^{2}({3u+1})^{2}du\\[2ex]&\int {3u^{2}+6u+1}du\\[2ex]&{3u^{3}+3u^{2}+u}{\bigg |}_{-2}^{2}\\[2ex]&{3\cdot 2^{3}+\cdot 2^{2}+2-3\cdot -2^{3}+3\cdot -2^{2}-2}\end{aligned}}}](https://en.wikipedia.org/api/rest_v1/media/math/render/svg/0e3c71eee1b3b41c7e1d19cc966087dc210dfca0)