diff --git a/sum23/lecture_materials/02_Operators_Vars_Exprs/02_Operators_Vars_Exprs.pdf b/sum23/lecture_materials/02_Operators_Vars_Exprs/02_Operators_Vars_Exprs.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..fd913f8f7a309409fb951f7a63c620668b49cce1
Binary files /dev/null and b/sum23/lecture_materials/02_Operators_Vars_Exprs/02_Operators_Vars_Exprs.pdf differ