/ x\
| x -| x
| - 3 3| -
|/ 2 \ 3 x *e | 3 3
|\2*x + x*x/*e + -----|*cosh(x) + x *e *sinh(x)
\ 3 /
$$x^{3} e^{\frac{x}{3}} \sinh{\left(x \right)} + \left(\frac{x^{3} e^{\frac{x}{3}}}{3} + \left(2 x^{2} + x x\right) e^{\frac{x}{3}}\right) \cosh{\left(x \right)}$$
x
/ / 2 \ \ -
| 2 \54 + x + 18*x/*cosh(x) 2*x*(9 + x)*sinh(x)| 3
x*|x *cosh(x) + ------------------------ + -------------------|*e
\ 9 3 /
$$x \left(x^{2} \cosh{\left(x \right)} + \frac{2 x \left(x + 9\right) \sinh{\left(x \right)}}{3} + \frac{\left(x^{2} + 18 x + 54\right) \cosh{\left(x \right)}}{9}\right) e^{\frac{x}{3}}$$
x
/ / 3 2 \ / 2 \ \ -
| 3 \162 + x + 27*x + 162*x/*cosh(x) 2 x*\54 + x + 18*x/*sinh(x)| 3
|x *sinh(x) + ---------------------------------- + x *(9 + x)*cosh(x) + --------------------------|*e
\ 27 3 /
$$\left(x^{3} \sinh{\left(x \right)} + x^{2} \left(x + 9\right) \cosh{\left(x \right)} + \frac{x \left(x^{2} + 18 x + 54\right) \sinh{\left(x \right)}}{3} + \frac{\left(x^{3} + 27 x^{2} + 162 x + 162\right) \cosh{\left(x \right)}}{27}\right) e^{\frac{x}{3}}$$