Question

{7+4.3-[(-2).2-6)]}+(2+6-5.3)+3-(5-2:2)

Answer 1

$(7+4*3-((-2)*2-6))+(2+6-5*3)+3-(5-\frac{2}{2})=\\\\(7+12-(-4-6))+(2+6-15)+3-(5-1)=\\\\(7+12-(-10))+(-7)+3-4=\\\\(19+10)-7-1=\\\\29-8=21$