Question: A better way to sum multiple fields

[yanocta]

Is there a way to instead of doing this:

SUM(SUM(SUM(amount_tax, amount_tax_2), amount_tax_3), amount_tax_4)

If possible, can we do it like either these:

SUMA(amount_tax, amount_tax_2, amount_tax_3, amount_tax_4)

or

SUM(ARRAY(amount_tax, amount_tax_2, amount_tax_3, amount_tax_4))