$124+28$
$\log x=\log8$
$4x^2-4x+40$
$3,18+5,4$
$\int_2^4\left(x^2\ln\:\left(x+1\right)\right)dx$
$x2+4x+4x^2+1$
$\frac{7x}{12x-15}$
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