exam Maths Puzzle Numerical Ability

sin(^2)x(tan(^2)x+1

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Tutor could you please help me subtract and simplify this problem please.

x/x^2-3x+2 + 3/X^2+x-2

Thank you!
Determine which two equations represent parallel lines.
y = -5x + 2
y = 5x + 2
y = 1/5 x + 2
y = -5x + 5