def strange_function(x):
    return sin(x + cos(x + sin(x)))
def ssin(x):
    for i in range(100):
        x = sin(x)
    return x
def sin_mul_cos(x):
    return sin(x) * cos(x)
def sin_div_cos(x):
    return sin(x) / cos(x)
def sin_plus_cos(x):
    return sin(x) + cos(x)