计算:an﹣5(an+1b3m﹣2)2+(an﹣1bm﹣2)3(﹣b3m+2)
(1)÷(-5)=____;(2)(-0.8)×(-0.5)=____;
计算:(1)-7-3=______ (2)5.8-(-3.6)=_____ (3)_______
计算:x2·x3+·(-2x2)2+24x7÷(-4x2)
计算:
化简:.