16.1    a) integral (x^2+1) dx from 0 to inf
        b) integral 1/(x+1) dx from 0 to inf
        c) integral (x^3+1)/x^5 dx from 1 to inf
        d) integral e^(-x/2) dx from 0 to inf
        e) integral x*e^(-x^2) dx from 0 to inf
        f) integral 1/(x^2+1) dx from 0 to inf
        g) integral x^3/(x^4+2) dx from 1 to inf
        h) integral x^3/(x^8+1) dx from 1 to inf
        i) integral cos^2 x dx from -inf to 0
        j) integral sin(x)*cos^3(x) dx from pi to inf
        k) integral 1/(x*ln^2(x)) dx from 2 to inf
        l) integral 1/((1+x^2)*(1+arctan x)) dx from 0 to inf
        m) integral e^(-x)*cos(x) dx from 0 to inf

16.2    a) integral 1/x dx from -inf to inf
        b) integral x/(x^2+4)^(3/2) dx from -inf to inf
        c) integral x/(x^2+1) dx from -inf to inf
        d) integral 1/(x^2+4x+9) dx from -inf to inf