>	restart;#К задаче 5 серии D3

>

m:=1:

>	eq:=m*diff(x(t),t$2)=32*sin(5*t)-32*x(t);

>	R:=dsolve({eq,x(0)=0,D(x)(0)=13},x(t));

>	evalf(subs(t=0.4,R));