.gif file,    4-bar linkage spherical mechanism animation

@Carl Love 

Many examples on my page. Examples constructing geodesic repeated from the beginning (intermittently) to reduce file size and mechanisms try to finish smoothly animation to look smooth and continuous.
I understand the question? I just really do not know much English

@Carl Love 

Yes, it is. GIF. Usually inserted - through the green arrow ... More do not know anything. I have all the files .Gif animation as shown.

http://www.maplesoft.com/applications/view.aspx?SID=34940

and:

https://vk.com/doc242471809_332342637

https://vk.com/doc242471809_332344020

restart:
f:=(x2^20*x4^2)/(x1^10*x3^5*x5*x6^5);
n:=nops(f); 
x := seq(eval(cat('x', i)), i = 1 .. n);
for i to n do
k:= degree(f,x[i]); if k<0 then print( 1/x[i],k); fi ;od:

restart:

f := x1^2/(x2^3*x3^2*x4*x5^10);

n := 5;

x := seq(eval(cat('x', i)), i = 1 .. n);

for i from 2 to n do

op(1, op(i, f))^sign(op(2, op(i, f)))

                                                      end do;

@Hypnos 

restart: with(RootFinding):

f1 := c1+2*c2-3:

f2 := c1+9*c2-5:

f3 := c1^2+c2^2-1:

solve({f1, f2, f3}, {c1, c2});

Isolate([f1, f2, f3], [c1, c2]);

“Solve” is nothing  and  “Isolate”  is  empty... Maple15

“nothing return after solve({y1 = c1*x1 + c2*x2, y2 = c1*x3 + c2*x4, c1^2 + c2^2 = 1}, {c1,c2});”

How many variables (n) and how many equations (m)? It is necessary that n = m  

restart;

f := ln(x);

(diff(f, x))/(diff(ln(x), x));

1;

@Markiyan Hirnyk  ?

http://hostingkartinok.com/show-image.php?id=de847a09264bc43e9ad728995cfeeb59

http://hostingkartinok.com/show-image.php?id=09dcc30c0406a759d0b4e9a9d314e6a4

That was my mistake.

Draghilev.

Small remark: Diaghilev. Draghilev A.V. requested the so to write his name in English.

@Kitonum 

Shall look for more examples...

(x1+0.7e-1*sin(30*x2)^2)^2+(x2+0.7e-1*sin(30*x1)^2)^2-1=0;