 \vec{ a }   +  \vec{ b } 

m = 1 (slider from -3 to 3, step 0.1)
e = 2.718281828459045
A = Intersect(xAxis, yAxis)
B: (m, 0.0)
a = Vector(A, B)
C = (1, 0)
tekst1: m + " * a"
u = Vector(A, C)