Add the following algebraic expressions:
(i) \(3a^{2}b, -4a^{2}b, 9a^{2}b\)
(ii) \(\frac{2}{3}a, \frac{3}{5}a, -\frac{6}{5}a\)
(iii) \(4xy^{2}-7x^{2}y, 12x^{2}y-6xy^{2}, -3x^{2}y+5xy^{2}\)
(iv) \(\frac{3}{2}a-\frac{5}{4}b+\frac{2}{5}c,\frac{2}{3}a-\frac{7}{2}b+\frac{7}{2}c,\frac{5}{3}a+\frac{5}{2}b-\frac{5}{4}c\)
(v) \(\frac{11}{2}xy+\frac{12}{5}y+\frac{13}{7}x, -\frac{11}{2}y-\frac{12}{5}x-\frac{13}{7}xy\)
(vi) \(\frac{7}{2}x^{3}-\frac{1}{2}x^{2}+\frac{5}{3}, \frac{3}{2}x^{3}+\frac{7}{4}x^{2}-x+\frac{1}{3}, \frac{3}{2}x^{2}-\frac{5}{2}x-2\)