Optimize calc() usage in scss files

[ShatilKhan]

Description

Optimization of some math equations inside calc() in scss files was done.

Issues Resolved

Fixes #1002

Check List

• [ ] New functionality includes testing.
• [ ] New functionality has been documented.
• [ ] All tests pass
  • [ ] yarn lint
  • [ ] yarn test-unit
• [X] Update CHANGELOG.md
• [X] Commits are signed per the DCO using --signoff

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