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\left(3x^{2}\right)^{2}-\left(y^{3}\right)^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\left(3x^{2}\right)^{2}-y^{6}
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
3^{2}\left(x^{2}\right)^{2}-y^{6}
Expand \left(3x^{2}\right)^{2}.
3^{2}x^{4}-y^{6}
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
9x^{4}-y^{6}
Calculate 3 to the power of 2 and get 9.
\left(3x^{2}\right)^{2}-\left(y^{3}\right)^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
\left(3x^{2}\right)^{2}-y^{6}
To raise a power to another power, multiply the exponents. Multiply 3 and 2 to get 6.
3^{2}\left(x^{2}\right)^{2}-y^{6}
Expand \left(3x^{2}\right)^{2}.
3^{2}x^{4}-y^{6}
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
9x^{4}-y^{6}
Calculate 3 to the power of 2 and get 9.