The total mass of a textbook and 8 notebooks is 800 grams. The mass of the textbook is 200 grams. If the notebooks have the same mass, find the mass of each notebook.

Сложите почленно неравенства. \( 11<13 \) и \( 5,1>2,7 \)

e) \( \sqrt[2]{2} \cdot \sqrt[2]{18}= \)

\( \frac { 4 x y } { x ^ { 2 } + y ^ { 2 } } \)

d) \( \frac{3^{4}: 3}{3^{2}}= \)

a) \( \left(3^{6}\right)^{7} \cdot 3^{2}: 3^{41}-5^{2}= \) c) \( \left[\left(2^{2}\right)^{3}\right]^{3}:\left(2^{3}\right)^{5}= \) e) \( 4^{3} \cdot\left(4^{5}\right)^{4}:\left(4^{3}\right)^{7}-2^{4}= \) g) \( \left[\left(5^{3}\right)^{12}:\left(5^{2}\right)^{17}-25\right]: 5= \) i) \( \left.2^{6}+10 \cdot\left[3 \cdot 3^{3}-\left(3^{4}\right)^{3}: 3^{11}\right)\right]= \)