import math
print(" + (addition) , - (subtraction), * (multiplication) ,/ (division) , ** (power)")
print("use space as delimenter ")
string=str(input("Enter Expression "))
string=string.replace("sin","math.sin")
string=string.replace("cos","math.cos")
string=string.replace("tan","math.tan")
string=string.replace("sec","math.sec")
string=string.replace("cosec","math.cosec")
string=string.replace("log","math.log")
string=string.replace("e","2.718281828459045")
print(string)
a=float(input("Enter upper bound "))
b=float(input("Enter lower bound "))
delta_x=(a-b)/100000
inputs=[]
while b<=a:
inputs.append(b)
b=b+delta_x
inputs.append(b)
#print(inputs) n-partitions
res=0
for i in inputs:
x=i
if i==a:
res=res+eval(string)
elif i==b:
res=res+eval(string)
else:
res=res+(2*eval(string))
res=(delta_x/2)*res
print("Value after integration is...",res)
