Confused Man with Equations

A nab who is very confused. The man is doing math in his head. There is a thought bubble above his head. In the thought bubble is "7 x 3 − 13 x 2 + 9 4 x y − 5 y 2 + ln ⁡ ( 2 x + 3 y ) = 42 z − 17 e 2 + sin ⁡ ( π x − y ) + 11" and minimalistic design, bold lines, flat colors, and a white background. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.