f_1

f_2

f_3

f_1

f_2

f_3

f

f1(x) = ((1 / pi * 7) * sin(x))
f2(x) = ((1 / pi * (pi / 2 - 5)) * sin((2 * x)))
f3(x) = ((1 / pi * 13 / 9) * sin((3 * x)))
f(x) = f1(x) + f2(x) + f3(x)
a = false
Text1: "f_1(x) = " + (LaTeX[f1]) + ""
b = false
c = false
d = true
Text2: "f_2(x) = " + (LaTeX[f2]) + ""
Text3: "f_3(x) = " + (LaTeX[f3]) + ""
Text4: "f(x) = " + (LaTeX[f]) + ""