Find the sum of the following series
`51+52+53+…+92`

Find the sum of the following series : 3.1^(2) + 4.2^(2) + 5.3^(2) +…+(n+2). n^(2)

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 : 3.1^2+5.2^2+7.3^2 + .... to n terms .

Find the sum to n terms of the followig series : 3+7+14+27+52+…

Find the sum to inifinity of the following series: 1+2/3+3/(3^(2))+4/(3^(3))+ ……………. Find the sum of the following (22-24) series:

Find the next term in the following series: 31, 38, 44, 51, _______.

Find the sum of the following 102, 97, 92, … upto to 27 terms.