Evaluate the followings

1 riy -dy dx (iv) хе -(x+2y) dA Qı : 1st quadrant (0) SL. de (1) [L* m(x2 + y2 + 1)de diy Slo . (v) [L 1-y2 V / x2 + y2 1-y2 1 + x2 + y2 dx dy iii) s sw-1) x2 (y – 1) -dy dx