Tính: 1 + 2 + 3^2 + 4^2 + ... + 99^2 + 100^2

$$\begin{gathered} \mathrm{Tính}: 1 + 2 + 3^2 + 4^2 + ... + {99}^2+{100}^2 \\ \mathrm{Giúp} \mathrm{mk} \mathrm{nhé} \mathrm{mk} \mathrm{đg} \mathrm{cần} \mathrm{gấp}! \end{gathered}$$