`7^3 .9+3^2 .7^4 -45.539`
`=7^3 .9+7^4. 9-49.11.9.5`
`=7^3 .9+7^4. 9-7^2. 9.55`
`=7^2. 9(7+7^2-55)`
`=49.9(49+7-55)`
`=49.9=441`
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\(7^3.9+3^2.7^4-45.539\)
\(=7^2.7.9+9.7^2.7^2-9.5.49.11\)
\(=7^2.9.7+7^2.9.7^2-7^2.9.55\)
\(=7^2.9.\left(7+7^2-55\right)\)
\(=49.9.\left(7+49-55\right)\)
\(=441.1=441\)
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