134 в,г,з,ж 135 б,г 136 б,г

134.
в) \(\dfrac{a^2}{12b^2}:\dfrac{ab}{36}=\dfrac{3a}{b^3}\);
г) \(\dfrac{3x}{10a^3}:\dfrac1{5a^2}=\dfrac{3x}{2a}\);
ж) \(\dfrac{18c^4}{7a}:9c^2d=\dfrac{2c^2}{7ad}\);
з) \(35x^5y:\dfrac{7x^3}{3z^4}=15x^2yz^4\).

135.
б) \(\dfrac{8c}{21d^2}\cdot\dfrac{6c^2}{7d}=\dfrac{16c^3}{49d^3}\);
г) \(\left(-\dfrac{18a^2b^2}{5cd}\right):\left(-\dfrac{9ab^3}{5c^2d^2}\right)=\dfrac{2acd}{b}\).

136.
б) \(\dfrac{35x^2y}{12ab}:\dfrac{7xy}{8ab^2}=\dfrac{10bx}{3}\);
г) \(15a^2bx:\dfrac{a^3b^2}{30x^2}=\dfrac{450x^3}{ab}\).