( -2/5+11/13) di kali 5/2=

[tex] (-\frac{2}{5} + \frac{11}{13}) . \frac{5}{2} [/tex]
samakan dulu penyebutnya
= [tex] = (\frac{26}{65} + \frac{55}{65} ) . \frac{5}{2} [/tex]
= [tex] \frac{81}{65} .  \frac{5}{2} [/tex]
= [tex]= \frac{405}{130} = \frac{81}{26} [/tex]

semoga membantu...