W_{4,84}=1 + alpha*y^28 + (2541665635488 - 28*alpha)*y^30 + (9823332708126 + 378*alpha)*y^32 + (814254176290464 - 3276*alpha)*y^34 + (10022060094293520 + 20475*alpha)*y^36 + (166195916364703680 - 98280*alpha)*y^38 + (1900444350693767760 + 376740*alpha)*y^40 + (19058625259275729600 - 1184040*alpha)*y^42 + (155423610240154048800 + 3108105*alpha)*y^44 + (1055686707837235000800 - 6906900*alpha)*y^46 + (5918595407344519508700 + 13123110*alpha)*y^48 + (27399083201527453180128 - 21474180*alpha)*y^50 + (104321190554372486234736 + 30421755*alpha)*y^52 + (325436858055595729747584 - 37442160*alpha)*y^54 + (827320649434381560641184 + 40116600*alpha)*y^56 + (1702695667181026083785856 - 37442160*alpha)*y^58 + (2813771495973441088612800 + 30421755*alpha)*y^60 + (3696147606031661991581280 - 21474180*alpha)*y^62 + (3811650129256930344128745 + 13123110*alpha)*y^64 + (3038659201909998025803360 - 6906900*alpha)*y^66 + (1836801000745207862304240 + 3108105*alpha)*y^68 + (821426701899315777416640 - 1184040*alpha)*y^70 + (263203575095919496605840 + 376740*alpha)*y^72 + (57883361095171778362560 - 98280*alpha)*y^74 + (8225527684771899579168 + 20475*alpha)*y^76 + (690254468204611982112 - 3276*alpha)*y^78 + (29488675284471245724 + 378*alpha)*y^80 + (479493801118174752 - 28*alpha)*y^82 + (1237827504225168 + alpha)*y^84