pde_bihar44d_eq.c running. solve uxxxx(x,y,z,t) + uyyyy(x,y,z,t) + uzzzz(x,y,z,t) + utttt(x,y,z,t) + 2*uxxyy(x,y,z,t) + 2*uxxzz(x,y,z,t) + 2*uxxtt(x,y,z,t) + 2*uyyzz(x,y,z,t) + 2*uyytt(x,y,z,t) + 2*uzztt(x,y,z,t) + 2*u(x,y,z,t) = f(x,y,z,t) f(x,y,z,t) := (y^4*z^4*t^4 + x^4*z^4*t^4 + x^4*y^4*t^4 + x^4*y^4*z^4 + 4*z^2*t^2 + 8*y*z^3*t^3*x + 2*y^2*z^4*t^4*x^2 + 4*y^2*t^2 + 8*y^3*z*t^3*x + 2*y^4*z^2*t^4*x^2 + 4*y^2*z^2 + 8*y^3*z^3*t*x + 2*y^4*z^4*t^2*x^2 + 4*x^2*t^2 + 8*x^3*z*t^3*y + 2*x^4*z^2*t^4*y^2 + 4*x^2*z^2 + 8*x^3*z^3*t*y + 2*x^4*z^4*t^2*y^2 + 4*x^2*y^2 + 8*x^3*y^3*t*z + 2*x^4*y^4*t^2*z^2 + 2) * exp(x*y*z*t) in the hyper cube xmin< x