help me please in the equation

hi all I need help to write a second order equation in matlab used

ceq=x(5)-(((0.033*(4.8+0.374*(x(1)+x(2)))/(0.9*275*1000*35*(x(22)-0.042))
*(1-((0.59*1000*275*x(5))/(1000*35*x(22))))

[Star Strider]

It looks like you have written it.

What about it is not working? Is it throwing any errors or warnings? Is it not giving you the result you want?

[noman shah]

use simulink for writing/solving differential equations, i think it will ease your life