C40(x²)^0(-x)^4*1+C31(x²)^1(-x)^2*1²+C22(x²)²*1³=1+3+1=52.C10 8*x^8*2²*x^2+C10 10*x^10*(-1)=C10 8-C10 10=443.C10 7*2^7(-3)^3=120*128*(-27)=-414720