$-39+1+\left(-44\right)$
$\left(2a^3-b^2\right)^2$
$\sin x=1-\cos x$
$4cm^2+4m^4+c^2$
$\left(5b^2-2c^3\right)\left(5b^2+2c^3\right)$
$\int\left(\frac{t^3}{3e}\right)dt$
$\int\frac{1+3x}{x^2\left(x^2+3\right)}dx$
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