$10x-5y+2x-3y$
$x^2-18x-10=0$
$25y+12y-31y-8y-5y$
$3x\:+\:4x\:+\:5y\:+\:6y\:+\:7\:+\:8$
$90x^2-80-100$
$5x^{\frac{3}{1}}$
$\frac{x}{2}\cdot\frac{sin\left(x\right)}{1-cos\left(x\right)}$
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