Captcha − 1 = 6

Captcha 18 − = 9

Captcha 85 + = 88

Captcha 6 + 1 =

Captcha − 4 = 4

Captcha 42 − 39 =

Captcha + 5 = 11

Captcha 77 − 69 =

Captcha + 11 = 17

Captcha 10 + = 16