= 2x*(-1/512x³y³)*5/2 *y²z * 1/81 * x²z⁴ =
=- 2*1/512*5/2*1/81*x⁶y⁵z⁵ = -1/512*5/1*1/81*x⁶y⁵z⁵ =
=-1/512*5/1*1/81*3⁶*2⁵*(-1)⁵ = 1/16*9*5 = 45/16
1504=4*376=4*4*94
var
2215, 2216, 2217, 2218, 2219, 2220, 2221