33x36+99x98=33x3x12+99x98=99x12+99x98=99x(12+98)=99x110=(100-1)x110=100x110-1x110=11000-110=10890
33x36+99x98=33x36+33x3x98=33x(36+3x98)=33x(36+300-6)=33x(30+300)=33x30+33x300=990+9900=10890