10.4	j)	integrate [1/x^2-1/(2*sqrt(x))]^2 dx

10.4	k)	integrate [(3x^3-4x+5sqrt(x))/x^2] dx

10.5	d)	integrate [2^x/4^x] dx

10.6	b)	integrate [(1+x)^2/(x(1+x^2))] dx

10.7	c)	integrate [tan^2x] dx
	d)	x*sin(a) + integrate [3*cos(pi+x)] dx
	
10.10	b)	integrate [sin(3x)] dx

10.11	d)	integrate [(2x+7)/sqrt(1-x^2)] dx

10.13	c)	integrate [(x^2)/(x^2+5)] dx
	f)		-2sqrt(2+cos^2(x)) - integrate [(sin(2x))/sqrt(2+cos^2x)] dx
	
10.16	a)	2/5*sqrt(1-x)^5-2/3*sqrt(1-x)^3-integrate [x*sqrt(1-x)] dx
	c)	integrate [sqrt(1-x^2)] dx
	
10.17	c)	integrate [3sqrt(x)/(1+x^(3/4))] dx

10.19	b)	integrate [x*cos x] dx
	h)		integrate [ln(x^2+1)] dx
	
10.20	b)	integrate [x^3e^x] dx
	f) 	integrate [sin(ln(x))] dx