how can i add all this varible togeather

[XxEvilxX]

a = Text16.Text * 2
b = Text14.Text * 2
c = Text12.Text * 2
d = Text10.Text * 2
e = Text8.Text * 2
f = Text6.Text * 2
g = Text4.Text * 2
h = Text2.Text * 2

i have to what Add1 = len(((a + b) + (c+d)) + ((E+f) + (g + h )))