6

abcd

a + bc

a + bcd

ab + 3ac - bdpq - 47aabg + 13

aaaaaaaaaaaaaaaaa - bqdpdbbpdq

( a + b + cc + d + ef + 4gh - i + jlm + n - o + ppq ) * ( m + nn + 3op - 2q + r + st + u + v + w ) + 47z
