Add bigdecimal capability#32

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gbenroscience wants to merge 8 commits intomasterfrom

add-bigdecimal-capability

Commits on Jan 1, 2022

added tests for BigMathExpression
gbenroscience
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Commits on Feb 8, 2023

finished basic BigMathExpression
gbenroscience
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Commits on Feb 10, 2023

further changes for BigMathExxpression
gbenroscience
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Commits on Feb 14, 2023

save comments on BigMathExpression
gbenroscience
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