standard_operators

expression="1 + 2"
echo "$expression = $(($expression))"

expression="4 - 3"
echo "$expression = $(($expression))"

expression="5 * 6"
echo "$expression = $(($expression))"

expression="26 / 5"
echo "$expression = $(($expression))"

expression="26 % 5"
echo "$expression = $(($expression))"

expression="1 == 1"
echo "$expression = $(($expression))"

expression="1 == 2"
echo "$expression = $(($expression))"

expression="1 != 2"
echo "$expression = $(($expression))"

expression="1 != 1"
echo "$expression = $(($expression))"