  We construct the elliptic Miura transformation and use it to obtain the
expression of the currents of elliptic corner VOA. We subsequently prove a
novel combinatorial formula that is essential for deriving the quadratic
relations of the currents. In addition, we give a conjecture that relates the
correlation function of the currents of elliptic corner VOA to a certain family
of partially symmetric polynomials. The elliptic Macdonald polynomials,
constructed recently by Awata-Kanno-Mironov-Morozov-Zenkevich, and
Fukuda-Ohkubo-Shiraishi, can be obtained as a particular case of this family.
