Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
Cristina, John, Clarissa and Sarah want to give their mother a photo album for her birthday. Cristina brings 7 photos, John brings 10 photos and Sarah brings 9 photos. If the photo album has 40 slots available, how many photos does Clarissa need to bring in order to complete the photo album?

### Response:
 ยกเว้นคลาริสซา มีรูปภาพทั้งหมด 7 + 10 + 9 = <<7+10+9=26>>26 รูป
คลาริสซาต้องนำรูปภาพมาอีก 40 - 26 = <<40-26=14>>14 รูปเพื่อที่จะสมบูรณ์อัลบั้มรูปภาพ.