$f\left(x\right)=-4x^2+4$
$10a-15b$
$2^2+-1^3$
$m^8+18m^4+81$
$a+\sqrt{a}a-\sqrt{a}$
$\int\left(\frac{10}{x-1}+\frac{32x-71}{x^2+9}\right)dx$
$\int\left(\frac{x-1}{x^2-2x+5}\right)\cdot dx$
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