Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Ex Input:
the last place that he went to was the city animal shelter . there he donated some money to make sure the dogs and cats there are being taken care of . if there are 645 cats and 567 dogs there how many animals are there in the shelter ?

Ex Output:
1212

Ex Input:
a pet store had 7 siamese cats . if they sold 4 of them how many cats did they still have ?

Ex Output:
3

Ex Input:
christmas is near . mr. anderson president of nice people inc. organized a charity event to share happiness to the less fortunate people . the first thing that he did is to visit an orphanage . there he dressed up as santa and gave toys to the children . if he gave 134 toy cars to the boys and 269 dolls to the girls how many toys did he give to all ?

Ex Output:
403