What is m∠L?

Step 1: Recall angle theorem/properties of inscribed quadrilaterals in circle.
LINK: https://www.expii.com/t/angle-properties-of-inscribed-quadrilaterals-952
Step 2: Note down given values and examine the figure
Step 3: Identify the suitable theorem/property for the given question.
EXAMPLE: Opposite angles in an inscribed quadrilateral
are supplementary.
[math] \angle L + \angle J = 180\degree
Step 4: Use the theorem/property to find the unknown value.
EXAMPLE: From triangle ABC
\angle L+\angle J\ =180\degree
107\degree+\angle L=180
\angle L=180\degree-107\degree
\angle L=73\degree