2.1881   ODE No. 1881

1. Problem in Latex
2. Mathematica input
3. Maple input

$$\{x^{\prime }(t)+y^{\prime }(t)+y(t)=f(t),x^{″}(t)+x(t)+y^{\prime }(t)+y^{″}(t)+y(t)=g(t)\}$$ ✓ Mathematica : cpu = 0.0090748 (sec), leaf count = 44

$$\left\{\{x(t)\to -f^{\prime }(t)-f^{″}(t)-f(t)+g^{\prime }(t)+g(t),y(t)\to f^{″}(t)+f(t)-g^{\prime }(t)\}\right\}$$ ✓ Maple : cpu = 0.03 (sec), leaf count = 48

$$\left\{\{x\left(t\right)=-\frac{\mathrm{d}}{\mathrm{d}t}f\left(t\right)+g\left(t\right)-f\left(t\right)-\frac{{\mathrm{d}}^2}{\mathrm{d}{t}^2}f\left(t\right)+\frac{\mathrm{d}}{\mathrm{d}t}g\left(t\right),y\left(t\right)=f\left(t\right)+\frac{{\mathrm{d}}^2}{\mathrm{d}{t}^2}f\left(t\right)-\frac{\mathrm{d}}{\mathrm{d}t}g\left(t\right)\}\right\}$$