5 6 12c a ) 2 3 3c 2a July 8, 2019 16 32 64 128 5 6 12c a )+ 2 3 3c 2a 12c(3c + 4) - (6c + 5)^212c(3c+4)−(6c+5) 2 5) 2c - (9 - 5 1c) 6) - 5c + (13 - 6c) (5c ^ - 3)/(c ^ - 3 - 3) - (c ^ - 3 + 6)/(2c ^ - 3 - 6) * 90/(c ^ - 6 + 6c ^ - 3)