begin align

• https://tex.stackexchange.com/questions/546655/how-does-align-work#546699

\[ \begin{align*} &\text{base case:}~~D_{(i, i)}=&0 \\ &\text{base case:}~~D_{(i, i+1)} = &k[i]+k[i+1]\\ &\text{general case:}~~D_{(i,j)}= &\sum_{m=i}^{j}k[m]+\arg \min_{i~\le~l ~\lt~j}{ D_{(i,~l)} + D_{(l+1,~ j)} } \end{align*} \]