import sys
from math import pow
step=0.01
N=100
M=100
len1=2
len2=6
def FunctionMax(x1,x2):
    return 2*pow(x1,3)+x2*x1+x2

func_list=list()

def FindMax(N,M, len1, len2):
    F_max=-sys.maxsize
    x1=0
    x2=-2
    step1=len1/N
    step2=len2/M
    for i in range(1,N+1):
            x2=-2
            for j in range(1,M+1):
                    temp_list=list()
                    y=FunctionMax(x1, x2)
                    if y>F_max:
                        F_max=y
                        temp_list.append(x1)
                        temp_list.append(x2)
                        temp_list.append(y)
                        func_list.append(temp_list)
                    x2=x2+step2
            x1=x1+step1
    return F_max

res=FindMax(N,M, len1, len2)
print(res,'\n')