$4\left(1\right)^3-4\left(1\right)^2+9\left(1\right)-9$
$2^2\cdot2\cdot2$
$\left(2a+b-c\right)^2-\left(a+b\right)^2$
$\int\frac{-7x^2+23x-1}{\left(x-1\right)\left(3x^2-x-2\right)}dx$
$2x^23x-1$
$\frac{3x^4+5x^3-2x^2}{x+4}$
$sin\left(5x\right)cos\left(10x\right)-cos\left(5x\right)sin\left(10x\right)=-0.65$
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