计算: ( 2 - 3 ) ( 2 + 3 ) + tan 60 ° - ( π - 2 3 ) 0
×(-)÷3÷1
(-9)﹣[-(-3)×(-2)]
6×÷×(-6)
-3-4+19-11+2
⑴(-0.9)+(+4. 4)+(-8.1)+(+5.6)