Hello!, Is there any package to do arithmetic operations on finite field? 
 

Example: Z(5) - over field 5: calculate with remainders:

(x^8 + 2x^4 + 1) / (x^5 + 4x^3 + x^2 + 3x +3).

thanks.

When function is given as two variables, how to find extremas? help thanks

example: z=x³+y³-3xy

and alse the function as given condition z=x+2y, x²+y²=5

Hello :)

When points of triangle, A, B, C (R^2) are given, how to find area of triangle; equation and radius of circle which passes traingle(A,B,C) and height(AH).

or where can i find information about how to do this?

thank you so much:)

How to get tangent angle between two curves? 

example for these : f(x)=((x^4+5)^(1/2))/(sinx+5) and g(x)=cosx^2   ; x>0

thanks :)

Hello, How to do simple analyse on function? like find intervas where function negative and positive, monotone, critical points... 

And also how to plot them on one graph?

thanks :)