$\frac{1}{4}a^2-121$
$4x^2-4x-24$
$sec\left(x\right)=1.236$
$\frac{d^2}{dx^2}\left(y^2=4ax\right)$
$-y^2+y+4$
$15n^2m^3-60n^3m^2-35nm^5$
$\int_0^3\left(\frac{2x^3+3x^2+10x+12}{\left(x^2+4\right)^2}\right)dx$
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