2la25x4la13x8la7= [tex]2^{25}* (2^{2})^{13} * (2^{3})^{7}=2^{25} * 2^{26} * 2^{21}= 2^{72}[/tex]
9la1001+9la1000+7x9la999=[tex]9^{999} *(9^{1001-999} + 9^{1000-999} +7)= 9^{999} * (9^{2}+9+7)= 9^{999} *(81+9+7)= 9^{999} * 97[/tex]
La celalat nu imi dau seama ce ai scris nu stiu daca e inmultire sau x