$-4x^2-4x-4$
$\left(b^2-13b+10\right)+\left(-2b^2+5\right)$
$\int80sec^2xdx$
$2x^4dx+\left(2y+3\right)dy=0$
$6x^2-ax-15x^2$
$542,5+19,32$
$4+x>-6$
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