Mathematical Calculation Using console application in c#

Question

hi..
I have Console application.I want to do complex mathematical calculation in that.
In my application there is int & double both type of variables.
 
I want to solve something like..
y=a*x+b*x^2+c*sqrt(x)-d*x^3-e+log(f)*x
some variables are int or some are double.
 
Thanks