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\left(8z^{3}\right)^{2}-49
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 7.
8^{2}\left(z^{3}\right)^{2}-49
Expand \left(8z^{3}\right)^{2}.
8^{2}z^{6}-49
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
64z^{6}-49
Calculate 8 to the power of 2 and get 64.
\left(8z^{3}\right)^{2}-49
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 7.
8^{2}\left(z^{3}\right)^{2}-49
Expand \left(8z^{3}\right)^{2}.
8^{2}z^{6}-49
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
64z^{6}-49
Calculate 8 to the power of 2 and get 64.