I'm new to latex and i would like to write in latex code the formula for maximum likelihood with the L and lambda in parenthesis. I thought I would find it easily on the internet but no luck. It is the two formulas written below especially the 1 with the contour.

$L(\lambda) = \Prod\limits_{i=1}^{N} P(X=x_{i})$– Apr 11 '18 at 16:36\boxedcommand, and maybe thefleqnoption (or the homonymous environment). – Bernard Apr 11 '18 at 16:54