<<< native
[ EText
    TextNormal
    "And this shows a combination with a background image at a desired opacity\160"
, EGrouped
    [ ESub (EIdentifier "Z") (EIdentifier "\945")
    , EDelimited "(" ")" [ Right (EIdentifier "f") ]
    , ESymbol Rel "="
    , EFraction
        NormalFrac
        (ENumber "1")
        (EGrouped
           [ ENumber "2"
           , EIdentifier "i"
           , ESymbol Ord "\8201"
           , EMathOperator "cos"
           , EDelimited
               "("
               ")"
               [ Right
                   (EFraction
                      NormalFrac
                      (EGrouped [ EIdentifier "\945" , EIdentifier "\960" ])
                      (ENumber "2"))
               ]
           ])
    , EGrouped
        [ ESub (ESymbol Op "\8747") (EIdentifier "C")
        , EFraction
            NormalFrac
            (EGrouped
               [ EIdentifier "f"
               , ESymbol Open "("
               , EIdentifier "i"
               , EIdentifier "z"
               , ESymbol Close ")"
               , ESuper
                   (EDelimited
                      "(" ")" [ Right (ESymbol Bin "-") , Right (EIdentifier "z") ])
                   (EIdentifier "\945")
               ])
            (EGrouped
               [ ESuper
                   (EIdentifier "e")
                   (EGrouped [ ENumber "2" , EIdentifier "\960" , EIdentifier "z" ])
               , ESymbol Bin "-"
               , ENumber "1"
               ])
        ]
    , ESymbol Ord "\8518"
    , EIdentifier "z"
    ]
]
>>> tex
\text{And this shows a combination with a background image at a desired opacity~}{Z_{\alpha}(f) = \frac{1}{2i\,\cos\left( \frac{\alpha\pi}{2} \right)}{\int_{C}\frac{f(iz)( - z)^{\alpha}}{e^{2\pi z} - 1}}\mathbb{d}z}