import os
from time import sleep
from selenium import webdriver
from selenium.webdriver import ActionChains
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.keys import Keys

from selenium.webdriver.common.by import By
driver = webdriver.Firefox()
actionChains = ActionChains(driver)

driver.get("http://neuralnetworksanddeeplearning.com/chap1.html")

sleep(1)

# formulas = driver.find_elements(By.CLASS_NAME, 'MathJax_FullWidth')


formulas = driver.find_element(By.TAG_NAME, 'img')

# print(len(formulas))
# for formula in formulas[-5:]:
#     actionChains.context_click(formula).perform()
#     sleep(1)
# actionChains.context_click(formulas[9]).perform()
# actionChains.context_click(formulas).perform()

formulas.send_keys(Keys.)

sleep(2)
driver.quit()