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\left(13t\right)^{2}-0.3^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
13^{2}t^{2}-0.3^{2}
Expand \left(13t\right)^{2}.
169t^{2}-0.3^{2}
Calculate 13 to the power of 2 and get 169.
169t^{2}-0.09
Calculate 0.3 to the power of 2 and get 0.09.
\left(13t\right)^{2}-0.3^{2}
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
13^{2}t^{2}-0.3^{2}
Expand \left(13t\right)^{2}.
169t^{2}-0.3^{2}
Calculate 13 to the power of 2 and get 169.
169t^{2}-0.09
Calculate 0.3 to the power of 2 and get 0.09.