$\vec{v}$

$\vec{u}$

A = (-3, 1)
D = (-2, 3)
B = (3, 3)
v = Vector(A, D)
u = Vector(A, B)
α = Angle(u, v)
c: (u * v)
Text1: "\vec{u} \cdot \vec{v} = \left(\begin{array}{c} " + (LaTeX[x(u)]) + " \\ " + (LaTeX[y(u)]) + " \ \end{array}\right) \cdot \left(\begin{array}{c} v_1 \\ v_2  \end{array}\right) = " + (LaTeX[x(u)]) + " \cdot \underbrace{v_1}_{" + (LaTeX[x(v)]) + "} + " + (LaTeX[y(u)]) + " \cdot \underbrace{v_2}_{" + (LaTeX[y(v)]) + "}= " + (LaTeX[c]) + ""