$x^2+x+25=0$
$6,5\cdot7,89\cdot2,2$
$\int\frac{4x^2-1}{\left(2x\right)\left(x^2+2x+1\right)}dx$
$\left(x^4+3x\right)\left(x^4+2\right)$
$2x^4-2xy^2$
$\int\:\left(\frac{2}{x^2}+\frac{1}{x}+3x-\frac{4}{5}\right)dx$
$\int x^6e^{ax}dx$
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