can someone here help me out with an idea how to solve this DE :

S is real constant. i know that this is DE that cannot be solved according to derivative, or it is but if i solved it, i mean if i write it down this way :

i think it would be impossible to solve it, but this DE can't be written down in form easily either. of course i can try to solve it some of thease ways, but maybe there is some trick hiding here?