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\int 80y^{2}\mathrm{d}y
Aromātaitia te tau tōpū tautuhi-kore i te tuatahi.
80\int y^{2}\mathrm{d}y
Whakatauwehetia te pūmau mā te whakamahi i te \int af\left(y\right)\mathrm{d}y=a\int f\left(y\right)\mathrm{d}y.
\frac{80y^{3}}{3}
Nā te mea \int y^{k}\mathrm{d}y=\frac{y^{k+1}}{k+1} mō te k\neq -1, me whakakapi \int y^{2}\mathrm{d}y ki te \frac{y^{3}}{3}.
\frac{80}{3}\times 20^{3}-\frac{80}{3}\times 0^{3}
Ko te tau tōpū tautuhi ko te pārōnaki kōaro o te kīanga i aromātaitia i te tepe tōrunga o te pāwhaitua, tangohia te pārōnaki kōaro i aromātaitia i te tepe tōraro o te pāwhaitua.
\frac{640000}{3}
Whakarūnātia.