$-33-\left(-26\right)$
$\lim_{x\to1}\frac{1-\sqrt{x^2-1}}{1-\sqrt{1-x^2}}$
$6^2\cdot6^1$
$450+450+450$
$x^2-14x-51$
$\frac{d^2}{dx^2}\left(x^5+y^5=10\right)$
$x+2+x+27$
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