Question: symbolic ODEs with dsolve

Hey all, I want to solve ODEs with Maple but for some reason I am not getting any output. No error, just no output. Can someone tell me where I am going wrong (this DE is just a random example I pulled out of the air): > eqn := diff(y(t), `$`(t, 2))+1/y(t)^2 = sin(t); > dsolve(eqn, y(t));
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