Find the sum of the following series to n term: `3.1^2+5.2^2+7.3^2+……..`

Find the sum of the following series to n term: 3xx1^2+5xx2^2+7xx3^2+............

Find the sum of the following series to n term: 1^2-2^2+3^2-4^2+…....

Find the sum of the following series to n term: 1.23.+2.3.5+3.4.7+.……..

Find the sum of the following series to n term: 1. 2. 5+2. 3. 6+3. 4. 7+..........

Find the sum of the following series to n term: 1. 2. 4+2. 3. 7+3. 4. 10+ .......

Find the sum of the following series to n term: (n^2-1^2)+2(n^2-2^2)+3(n^2-3^2)+……...

Find the sum of the following series to n term: 1^3+3^3+5^3+7^3+.........

Find the sum of the following series whose n t h term is: 2n^3+3n^2-1.

Find the sum of the following series: 2.3+3.4+ ……….to n terms

Find the sum of the following series up to n terms : (1^(3))/(1)+(1^(3)+2^(2))/(1+3)+(1^(3)+2^(3)+3^(3))/(1+3+5)+...