More ideas from Julia
Tu .. Tuu .. Today you are hardcore.  Haven't prepare my mind yet. OMG. level 1 seem elementary maths .. level 2 = Diff Equa (Differential Equation) ==>  a bit self upset .. why my answer today like I am from other planet, UFO.  ----   。。。

Today you are hardcore. 😳 Haven't prepare my mind yet. level 1 seem elementary maths . level 2 = Diff Equa (Differential Equation) ==> 😣 a bit self upset . why my answer today like I am from other planet, UFO.