Revert "Remove parens"

This reverts commit 5ad712961c6fe9c28c7a90647de81a343feb6979.
Revert "Fix last multiplication"

This reverts commit 2d39900068f29c90be81fe3e0152bfc759329a60.
Revert "Use variables"

This reverts commit eb46c4e9af87fa187bf065b01d3ec26f68412c8b.
Revert "Fix declaration"

This reverts commit 33811bf7954d5726cf240e0f26bde322e5831ddf.
Revert "Introduce new variable"

This reverts commit aa0dd5b88531075ae48cddf287e7da3cabb96d8f.
Revert "Add parenteses"

This reverts commit 78527d9b1215b7ba4e6590420435db9b0215312e.
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