$1$ $\left(x^{\dfrac {3} {4}}y^{\dfrac {2} {3}}z^{\dfrac {1} {2}}\right)^{12}$ $5$ $\dfrac {\left(x^{-2}y^{-3}\longdiv{}3} {\left(6x^{-3}y^{-1}\right)^{-1}}$ $8$ $\dfrac {\left(5x^{2}y^{-2}\right)\left(5x^{-3}y^{2}\right)^{2}} {\left(x^{3}y^{-2}\longdiv{}1}$ $2$ $\dfrac {a^{\dfrac {1} {2}}b^{\dfrac {2} {3}}} {a^{\dfrac {1} {4}}b^{\dfrac {1} {6}}}$ $6$ $\dfrac {\left(a+2b\right)\dfrac {1} {2}.\left(a+2b\right)} {\left(a+2b\right)^{-\dfrac {3} {4}}}$ $9$ $\dfrac {\left(x^{4}y^{-2}z^{6}\longdiv{2}} {\left(x^{\dfrac {2} {3}}y^{\dfrac {1} {2}}2^{\dfrac {1} {6}}\right)}$ $-1$