Răspuns :
81 la puterea 7=22.876.792.454.961
81 la puterea 3=531.441
81 la puterea 5=3.486.784.401
81 la puterea 2=6.561
81 la puterea 3=531.441
81 la puterea 5=3.486.784.401
81 la puterea 2=6.561