-4arccos (-√2|2)+3 arcsin1|2-arctg(-1)= -4(π-arccos√2/2)+3*π/6-(-arctg1)=
= -4(π-π/4)+π/2+π/4= -4 *3π/4+π/2+π/4= -9π/4
-4arccos (-√2|2)+3 arcsin1|2-arctg(-1)= -4(π-arccos√2/2)+3*π/6-(-arctg1)=
= -4(π-π/4)+π/2+π/4= -4 *3π/4+π/2+π/4= -9π/4