evaluate the following summations. Use the properties of sigma notation to $1.$ $\sum _{i=1} ^{60}\left(5i-3\right)$ $2$ $\sum _{k=1} ^{32}\left(k-1\right)^{2}$ – $3$ $\sum n$ $i=1\left(1+2i\right)$ $4.$ $\sum _{k=1} ^{6}2k^{3}$ $5$ $\sum _{k=1} ^{15}k^{2}+\sum _{k=1} ^{5}\left(4k^{2}+3\right)$