$\int x\left(5x^2-2\right)^4dx$
$\int\left(\frac{8x}{4+x^2}\right)dx$
$cos3x\:=4cos^3x-3cosx$
$\left(9x+1\right)\left(7x-10\right)$
$4x^5+8x^3+4x$
$157.0796+94.2478+4\pi$
$3x^2-6x-4$
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