what is the sum of 5+7+7+6+6+7+8+8+6+6+6+7+8+7+7+7+7+778+8+8+8+8+7+6+688+8(87+8+7+8+(877777+88888+88888888+46+6777(7(7(7())))) ?​

what is the sum of 577667886667877777788888766888878788777778888888888888466777777 class=