diff ( y , x , 1 ) = expt ( sin ( 2.0 * x + 3.0 ), sin ( x + 1.0 ) ) * ( ( cos ( x + 1.0 ) * ln ( sin ( 2.0 * x + 3.0 ) )) + ( ( 2.0 * sin ( x + 1.0 ) * cos ( 2.0 * x + 3.0 ) ) / sin( 2.0 * x + 3.0 ) ) );
!
# Comment 1
Digits := 32;
max_terms := 30;
# Comment 2
!
# Comment 3
x_start := 1.8;
x_end := 1.81 ;
diff(y,0,exact_soln_y(x_start));
glob_look_poles := true;
glob_max_iter := 1000000;
# Comment 4
!
# Comment 5
exact_soln_y := proc(x)
# Comment 6
return(expt(sin(2.0*x+3.0),sin(x+1.0)));
# Comment 7
end;