Draw a function image：

y=cos(x)+3*cos(x+3.1415*2/3)+3*cos(x)+cos(x+3.1415*4/3)+3*cos(x+3.1415*4/3)+cos(x+3.1415*2/3)
y=3*cos(x)+cos(x+3.1415*4/3)
y=3*cos(x+3.1415*4/3)+cos(x+3.1415*2/3)
y=cos(x)+3*cos(x+3.1415*2/3)

Draw a function image：

y=sin（x-π）

Draw a function image：

y=((3^1/3)^2)*e^(1/3)x
y=e^(x^3)

Draw a function image：

y=100xcosx
y=100xsinx
y=xtan1/100000000000x

Draw a function image：

y=xln100+lnx