Explicație pas cu pas:
[tex] \bf \big(7^{11} \big)^{13} \cdot \big(7^{13} \big)^{7} :\big(7^{18} \big)^{13}\cdot 7^{2} +1^{2017}-2^{1} \cdot 5^{2} [/tex]
[tex] \bf 7^{11 \cdot 13} \cdot 7^{13 \cdot 7} :7^{18 \cdot 13}\cdot 7^{2} +1-2 \cdot 5^{2} = [/tex]
[tex] \bf 7^{143} \cdot 7^{91} :7^{243}\cdot 7^{2} +1-2 \cdot 5^{2} [/tex]
[tex]\bf 7^{143 + 91 - 243}\cdot 7^{2} +1-2 \cdot 5^{2} = [/tex]
[tex]\bf 7^{0}\cdot 7^{2} +1-2 \cdot 25 = [/tex]
[tex]\bf 1\cdot 49+1-50 = [/tex]
[tex]\bf 49+1-50 = [/tex]
[tex]\bf 50-50 = \red{ \boxed{ \bf \: 0 \: }}[/tex]
