y 2 = x , x = 2 y = ∫ 0 2 π [ x = 2 y − x = y 2 ] {\displaystyle y^{2}=x,x=2y{\begin{aligned}&=\int _{0}^{2}\pi [x=2y-x=y^{2}]\\[2ex]\end{aligned}}} < m a t h >= 64 p i 15 {\displaystyle <math>={\frac {64pi}{15}}}
![{\displaystyle y^{2}=x,x=2y{\begin{aligned}&=\int _{0}^{2}\pi [x=2y-x=y^{2}]\\[2ex]\end{aligned}}}](https://en.wikipedia.org/api/rest_v1/media/math/render/svg/ab872730522c476604bc0bbe81421b17ce829a77)
