Draw a function image：

y=40/3.14*(sin(10*3.14x)+1/3*sin(30*3.14x)+1/5*sin(50*3.14x)+1/7*sin(70*3.14x)+1/9*sin(90*3.14x))

Draw a function image：

y=sinx+sin2x+sin3x+sin4x+sin5x+sin6x+sin7x+sin8x+sin9x+sin10x+sin11x+sin12x+sin13x

Draw a function image：

y=sin30

Draw a function image：

y=0.1*(x+1)

Draw a function image：

y=｜2x-2｜-｜x-4｜