test1
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LaTeX rendering failed
! Package PGF Math Error: You've asked me to divide `-0.34203' by `0.0', but I
cannot divide any number by `0.0' (in '-90+atan(cos(0)*cos(-20- 90.0)/(sin(90)*
l.14 ...drawBallGrid[style={opacity=0.25}]{30}{30}
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