Please help me (this is math) I need help with the last 3

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

What are the exclude value of mn+3m