Răspuns:
b. ²⁴⁾1/5-⁸⁾1/15+¹⁵⁾5/8= (24-8+75)/120=91/120
c. (4×2+1)/2-(1×3+2)/3=³⁾9/2-²⁾5/3=(27-10)/6=17/6
