(adsbygoogle = window.adsbygoogle || []).push({}); plz help me soon, mass and spring equation

hi, sorry for my bad english, i need to three mass and four spring ode equations,

this system: wall -- spring -- mass -- spring -- mass -- spring -- mass -- spring -- wall

but i need this system that has damped, because i have this system equation that undamped,

plz help me soon, i need damped equation soon, thanks to all :!!)

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# Me soon, mass and spring equation

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