theta^4 - 16*t^2*theta*(theta+2)*((theta+1)^2) - 128*t^4*(theta+3)*(theta+1)*(11*theta^2+44*theta+48) - 19200*t^6*(theta+5)*(theta+1)*((theta+3)^2) - 77824*t^8*(theta+5)*(theta+3)*(theta+7)*(theta+1)