<Tri-2024-2152>, hint
Let <BCM=x, MB=c, BC=a MX=y, MC=m
By angle chasing <XMA=<MCX=x
AB/BC=AX/MC=c/a=y/m---> XA/MA=y/c=m/a. Hence Triangles XAC and XAM are
similar. Hence <XAC=XAM=z. MC is tangent to circle MXA. w
Let line NX cut w at P. Since MXAP are cyclic <APX=z=<XAM
Let line AC cut w at Q. Let M' be the midpoint of BC, Triangles MBM' and ABC are similar
<XNM=<MM'B=<BCA=<NCQ+<CQN...> <CQN=z=<APX Hence P=Q.
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