Use the --timeout flag to change the timeout.
\frac{6 \cdot \left(x - 1\right)}{\left(x + 1\right) + 4 \cdot \sqrt{x}}
(FPCore (x) :precision binary64 (/ (* 6.0 (- x 1.0)) (+ (+ x 1.0) (* 4.0 (sqrt x)))))
double code(double x) {
return (6.0 * (x - 1.0)) / ((x + 1.0) + (4.0 * sqrt(x)));
}