$\left(4x^3-2x\right)^2$
$45\cdot55$
$( \frac { 0 + 4 } { 2 } ) ^ { 2 }$
$\lim_{x\to0}\left(\frac{\left(1-e^x\right)\cdot x}{3x-1+e^{2x}}\right)$
$\int_1^{\infty}\left(\frac{5x+4}{x^2+x}\right)dx$
$\frac{x-4xy}{x}$
$\int x\cdot\cos\left(5\right)x\:dx$
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