A=37x44-11 B=41x39+18
A=37x(41+3)-11 B=41x(37+2)+18
A=37x41+37x3-11 B=41x37+41x2+18
A=37x41+111-11 B=41x37+82+18
A=37x41+100 B=41x37+100
\(\Rightarrow A=B\)
\(b=\left(37+2\right)x\left(44-3\right)+18=37x44-3x37+2x44-6+18\)
\(b=37x44-111+88+12=37x44-111+100=37x44-11=a\)