$-4x\cdot\left(x-4\right)^2+3\cdot\left(x^2-2x+3\right)-2x\cdot\left(-x^2+5\right)$
$\left|-30\right|+1$
$\frac{\left(45\right)}{\left(-45\right)}$
$\int\frac{3x+3}{x^2-3x+2}dx$
$5z^3-18z^3+7z^3$
$\left(-2ab^4-13a^4b^2\right)\left(11ab^4-13a^4b^2\right)$
$\frac{7^4}{7^3}$
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