Use a contour to evaluate Lo 1. dx
COS Use a contour to evaluate dr (2° +1)
1 Use a contour to evaluate Soº dx 1+x4
1 Use a contour to evaluate So da 1+x4
2x 1 Use a contour to evaluate dᎾ (2+0 -cos)
Use a contour to evaluate so x²+2x da (2-1)(x3+1)
Use a contour to evaluate S (2-1)723 +1) da 7T Answer:
x2+2x Use a contour to evaluate la da (x-1)(x?+1)
.21 1 Use a contour to evaluate S2 d8 (?+cos 8)2
Use a contour to evaluate x? dx (x2 +1)(x2+4) f