Question: How to solve for one variable in a two variable equation in maple?

I want to solve the following equation

1+{(25.*phi^3-297.*phi^2+1162.*phi-1500.))*(840.+332.*theta+29.*theta^2)/((phi^4-16.*phi^3+89.*phi^2-201.*phi+150.)*(3.+theta)*(28.+11.*theta+theta^2))}

in terms of theta.

i.e theta=[f(phi)].

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