Given the following thermochemical equations:

X2 + 3Y2 ----> 2XY3 ^H1= -390 kJ

X2 + 2Z2 ----> 2XZ2 ^H2= -190 kJ

2Y2 + 2Y2Z -----> 2Y2Z ^H3= -240 kJ

Calculate the change in enthalpy for the following reaction:

4XY3 + 7Z2 -----> 6Y2Z + 4XZ2

change H= ________ kJ