# Version v5.3.1
((-0.2675904440173584/((mchi1 - 1*0.1709438368060553)*(mchipm1/((-0.6304848019479864)*((0.066146833040938411/(0.2977333128821026/(mchipm1 + mchipm1) + (mchi1 - mchipm1)/mchi1)**2))*((0.07260831044039938 + 8.951199122075424/((mchi1*0.1709438368060553)))**2)) - 0.2675904440173584/mchipm1)) + 0.6955345839831512/((-35.45092321820688/((0.07250052755844655 + 8.951197831291678/((mchi1*0.17101141999820696)))*(mchi1 - 1*0.4793761720213704)))))**2 - 1.5895574426136225 - (-1)*8.673023774159901/(12261068026780.55/(mchi1 - mchipm1)**4))*3.6476351559826954 - 1*0.6181144824152078