\frac{5t}{16}\times \frac{-4t}{11}
−1615\frac{-16}{15}15−16 - ( −11\frac{-1}{1}1−1 )
\frac{5y}{9}\times \frac{2y}{15}
\frac{8}{z+6}=\frac{4}{5z}
\frac{m}{3}\div \frac{m}{4}
\frac{7x-13}{2}+3=3x
x+\frac{3x-4}{5}=2
\frac{4x-6}{5}-\frac{5x-4}{4}=1
\frac{5x-3}{5}-\frac{4x-6}{6}=5
\frac{3}{4u+3}=\frac{4}{7u}
