differential equations solution doesnt work

i have for example

syms x y(x) 
M4=(R1*x-p*g*pi*0.0810*(x-l1/2)-0.2626*p*g*pi*(x-K1-l2/2)-0.0630*p*g*pi*(x-K2-l3/2)-p*g*pi*((5*x - 19)*(3025*x^2 - 49225*x + 219217))/4704000)/E4/(pi*(b*x+c)^4/64);
%with all the variables known

and i type

ode = diff(y,x,2) == M4;
conds = [y(K4)==  1.7536e-04  Dy(K4)==  -2.6143e-04];
ySol(x) = dsolve(ode,conds);
ySol = vpa(simplify(ySol))*10^(6)

yesterday i could solve the equation but today i try it and it continuous running without stopping

Also when i int M4 the result is different from the result yesterday this one does not have and log in it or fantastic number

how can i fix this?

[darova]

Did you try to solve it numerically?

[Walter Roberson]

Please post values for all of the constants.

To verify: Dy is diff(y) ?

[Dimitrios Adam]

for some reason when i write

I=vpa((R1*x-p*g*pi*0.0810*(x-l1/2)-0.2626*p*g*pi*(x-K1-l2/2)-0.0630*p*g*pi*(x-K2-l3/2)-p*g*pi*((5*x - 19)*(3025*x^2 - 49225*x + 219217));

and i put I in M4 is working but when i leave it like the original it doesnt work . why?

Also the values are numbers

[Walter Roberson]

Please post values for all of the constants.

When you do that assignment to I, are you using I/E4/(pi*(b*x+c)^4/64) in place of the M4 you defined before?

[Dimitrios Adam]

R1=78055; l1 = 1.6; g=9.81; p=7860;  K1=l1; K2=3 ; l2=1.4 ; l3=0.8 ;b=-0.5/2.8; c= b*l1-1;

Yes i put it in the place of M4 defined before

[Walter Roberson]

The expression

I=vpa((R1*x-p*g*pi*0.0810*(x-l1/2)-0.2626*p*g*pi*(x-K1-l2/2)-0.0630*p*g*pi*(x-K2-l3/2)-p*g*pi*((5*x - 19)*(3025*x^2 - 49225*x + 219217));

is missing two ) somewhere. As we are not familiar with the underlying equations, we will have to get you to make the repair.