Sum of Series 2.1.0

Calculator of sum of series online solve:
[✔] The sum of the power series
[✔] The sum of the numeric range
[✔] The sum of finite and infinite series
[✔] Checking of convergence of the series
[✔] The numerical answer of the sum

Support:
[✔] Supported factorials expressions: n! or factorial(n)
[✔] Supported all math symbols and functions. For example: sin(n), cos(n), exp(n), tan(n), ctan(n), sqrt(n) and other.
[✔] Suported complex variables
[✔] A variety of arguments and options: n, a, b, c and etc.

The Calculator contain several features:
[✔] Several examples
[✔] Сorrect input expression errors

Examples of sum of series:
1/n^2
n^2/n!
sin(n)/(n!)^3