echo $((1+2))
echo $((10/3))
echo $((-7/2))
echo $((-7%3))
echo $((7%3))
echo $((2**10))
echo $((-2**2))
echo $((2**3**2))
echo $((~5))
echo $((1<<4))
echo $((16>>2))
echo $((6&3))
echo $((6|3))
echo $((6^3))
echo $((1<2))
echo $((2<=2))
echo $((1&&0))
echo $((0||7))
echo $((!0))
echo $((!5))
echo $((1?2:3))
echo $((0?2:3))
echo $(((1+2)*3))
echo $((1+2*3))
echo $(( (1+2)*3 ))
echo $((0x10))
echo $((010))
echo $((2#101))
echo $((1,2))
echo $((5-3-1))
echo $((100/5/2))
echo $((1==1))
echo $((1!=1))
echo $((3%2*4))
export AR1=5; echo $((AR1+1))
export AR2=5; echo $((AR2=9))
export AR3=5; echo $((AR3+=2))
export AR4=5; echo $((AR4*=2))
export AR5=5; echo $((AR5-=2))
echo $((1/0))
export AR6=5; echo $((AR6/=2))
echo "$((1+2))"
echo "x$((1+2))y"
echo $((AR7+1))
echo $( (echo a) )  #!unsupported
echo $((1+2
))
