graphics - Adding Math to Plots

I have several formulas I would like to place at specific coordinates in a Graphics object I have already created. I need to be able to choose bold or not as well as how large to make it. I am unsure how to control the size of the text as well as why Mathematica will not place it. Specifically, it continues to try to evaluate my text. One of the objects I wish to place on the plot is (since it won't let me post a picture)

$M^\mu = \oplus_{\lambda \ge \mu} \,m \, \lambda_\mu \, S^\mu$

However, Mathematica continues to try to evaluate the direct sum rather than just place it at say the point (0,0).

Here is the code I am trying at the moment:

Graphics[{Style[HoldForm[M^μ == \!\(*UnderscriptBox[(StandardForm[⊕]), (λ ≥ μ)]\) m Subscript[λ, μ] S^μ], Medium], FormatType -> StandardForm}]

Any ideas?

Comments

functions - Get leading series expansion term?

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