Let Σ_k=1^n a_k=α n^2+β n. If a_10=59 and a_6=7 a_1, then α+β is equal to

Let $\displaystyle \sum_{k=1}^n a_k=\alpha n^2+\beta n$. If $\displaystyle a_{10}=59$ and $\displaystyle a_6=7 a_1$, then $\displaystyle \alpha+\beta$ is equal to