（50-40×1.2）÷0.5,^2D,V6d;e+}0V6o,I;h*L.l9~0^(]'x*X
算式：提示2k+X+v9[,^2D,V6d;e+}0V6o,I;h*L.l9~0^(]'x*X
=1B(B:W6u0h;t0@)M,^2D,V6d;e+}0V6o,I;h*L.l9~0^(]'x*X