Question 1205703
<pre>

{{{f(x)}}}{{{""=""}}}{{{cos(pi/x)}}}

{{{f(x)}}}{{{""=""}}}{{{cos(pi*x^(-1))}}}

{{{"f'(x)"}}}{{{""=""}}}{{{-sin(pi*x^(-1))*(-pi*x^(-2))}}}

{{{"f'(x)"}}}{{{""=""}}}{{{(pi*x^(-2))sin(pi*x^(-1))}}}

{{{"f'(x)"}}}{{{""=""}}}{{{pi*(x^(-2))sin(pi*x^(-1))}}}

{{{"f''(x)"}}}{{{""=""}}}{{{pi*((x^(-2))cos(pi*x^(-1))*(-pi*x^(-2))+sin(pi*x^(-1))*(-2x^(-3))^"")}}}

{{{"f''(x)"}}}{{{""=""}}}{{{pi*((1^""/x^2)cos(pi^""/x^"")*(-pi^""/x^2)+sin(pi^""/x^"")*(-2^""/x^3)^"")))}}}

{{{"f''(x)"}}}{{{""=""}}}{{{pi*(expr(-pi^""/x^4)*cos(pi^""/x^"")-expr(2^""/x^3)*sin(pi^""/x^"")^"")))}}}

{{{"f''(x)"}}}{{{""=""}}}{{{expr(-pi^""/x^3)*(expr(pi^""/x^"")*cos(pi^""/x^"")+2*sin(pi^""/x^"")^"")))}}}

{{{(f(g(2)^"")^"")^"''"}}}{{{""=""}}}{{{f^("''")}}}{{{(g(2)^"")^"")}}}{{{""=""}}}{{{"f''(3)"}}}{{{""=""}}}{{{expr(-pi^""/3^3)*(expr(pi^""/3^"")*cos(pi^""/3^"")+2*sin(pi^""/3^"")^"")))}}}

{{{(f(g(2)^"")^"")^"''"}}}{{{""=""}}}{{{expr(-pi^""/27^"")*(expr(pi^""/6^"")+2*(sqrt(3)^""/2^"")^""))^"")}}}

{{{(f(g(2)^"")^"")^"''"}}}{{{""=""}}}{{{expr(-pi^""/27^"")*(pi^""/6^""+sqrt(3)^""))}}}

We don't need g'(2) = - 2, g ''(2) = 1/4

Be sure you copied it correctly.

Edwin</pre>