#groups.mtb

let k12=k6-1
let k13=k1/k6
let k13=k13/k12
let k14=k13*k9
let k15=2*k1*k2*k2*k2
let k16=3*k2*k4
let k15=k5-k16+k15
let k16=k13*k15
let k18=k16/k11
let k18=k18/k17
let k19=k14/k11
let k19=k19/k17
print k1-k19
end