$82+-100+-1+76+20$
$\frac{4x}{x-1}-\frac{5x}{x-2}=\frac{2}{x^2-3x+2}$
$2^2+8x-10$
$18.75-3.25-450$
$\int150\cdot sec^2x$
$6-4w+5w+8+2+8w-2$
$84\left(135\right)$
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