$b^2-5b+10$
$9x-4+-11x+9$
$\frac{4x-6}{x^2-3x+2}$
$\left(\left(+2\right)\cdot\left(-7\right)-8\cdot\left(-4\right)-\left(-5\right)\cdot\left(-2\right)-149+32-10\right)$
$\log\left(x+2\right)+\log\left(3+x\right)=\log\left(6x+2\right)$
$\sin\left(1+\cot^2\right)$
$\int-\frac{a}{b}dx$
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