Ineed deriving : (7x)/(3+x^2), i keep on deriving it wrong and i am not sure as to why

Find the sum of the following series. round to the nearest hundredth if necessary.

1- identificar select the category that corresponds to each term. january 23 11: 59 pm unlimited attempts remaining grade settings 276-279 vocabulary list modelo fiesta quinceañera casada adolescencia viudo juventud navidad niñez vejez aniversario de bodas divorciado madurez cumpleaños soltera

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart