[(30*1000)+(3x100)-(90+1028)]*3=
[ (30 * 1000) + (3x100) - (90 + 1028) ] * 3
Work from the inside out:
[ (30000) + (300) - (1118) ] * 3
Finish the inside:
[ 29182 ] * 3
= 87546
30000+3x+10000-1118