import math
import functools

N = int(input())
Xys = [tuple(map(eval,input().split())) for _ in range(N)]


def sin(vs):
    return [math.sin(v) for v in vs]
def cos(vs):
    return [math.cos(v) for v in vs]
def add(vs1, vs2):
    return [v1+v2 for v1,v2 in zip(vs1,vs2)]
def mul(vs1, vs2):
    return [v1*v2 for v1,v2 in zip(vs1,vs2)]
def div(vs1, vs2):
    if not len(vs2) or min(vs2) < .01:
        return []
    return [v1/v2 for v1,v2 in zip(vs1,vs2)]
def sub(vs1, vs2):
    return [v1-v2 for v1,v2 in zip(vs1,vs2)]

@functools.lru_cache(maxsize=None)
def evl(e):
    if e == 'x':
        return [a[0] for a in Xys]
    
    operand = e[0]
    args = tuple(map(evl, e[1:]))
    return eval(operand)(*args)
    


def chk(e):
    reslt = evl(e)
    if len(reslt) and max([abs(r-y)/max(1,abs(y)) for r,y in zip(reslt, [v[1] for v in Xys])]) <= 1e-3:
        return True
    
def pprint(e):
    #print(e)
    if e == 'x':
        return e
    if e[0] in ('sin','cos'):
        return f'{e[0]}({pprint(e[1])})'
    mpd = {'add':'+','sub':'-','mul':'*','div':'/'}
    return f'({pprint(e[1])}{mpd[e[0]]}{pprint(e[2])})'


exprs = [['x']]
for i in range(1,10):
    e2 = [('sin', v) for v in exprs[-1]] + [('cos', v) for v in exprs[-1]]

    for nl in range(0, (i-2)+1):
        nr = i - 2 - nl
        for op in ('add','mul','div','sub'):
            if (op == 'add' or op == 'mul') and nl < nr:
                continue
            for v1 in exprs[nl]:
                for v2 in exprs[nr]:
                    e2.append((op, v1, v2))
    exprs.append(e2)

    for e in e2:
        #assert e.count('sin') + e.count('cos') + 2*sum(e.count(x) for x in ('add','mul','div','sub')) == i

        if chk(e):
            print(pprint(e))
            quit()
            pass
print(len(exprs[-1]))