Plot the specified output by using the RK4 method.

\(2 \dddot{x}+9 \ddot{x}+10 \dot{x}+3 x^{2}=e^{-2 t / 5}, \quad x(0)=0, \quad \dot{x}(0)=-\frac{1}{4}, \quad \ddot{x}(0)=0, \quad 0 \leq t \leq 15\), output : \(x\)