In exercise 3 use the following notation:

a*sin(x),	-a*sin(x),	(a/b)*sin(x),	(-a/b)*sin(x)
a*cos(x),	-a*cos(x),	(a/b)*cos(x),	(-a/b)*cos(x)
a*e^(x),	-a*e^(x),	(a/b)*e^(x),	(-a/b)*e^(x)
a/x,	-a/x,	a/(b*x),	-a/(b*x)
a*x^(n),	-a*x^(n),	(a/b)*x^(n),	(-a/b)*x^(n)

Back to Exercise 3