S_z = Point(zAxis3D)
B = Point(xAxis)
C = (0, 0, 0)
a = Line(B, C)
S_x = Point(a)
E = Point(yAxis)
b = Line(C, E)
S_y = Point(b)
c: 1 / x(S_x) * x + 1 / y(S_y) * y + 1 / z(S_z) * z = 1
Text1: "$ \frac{x}{" + (LaTeX[x(S_x)]) + "}+\frac{y}{" + (LaTeX[y(S_y)]) + "}+\frac{z}{" + (LaTeX[z(S_z)]) + "} = 1 $"