$9a^2-b^2=15$
$\frac{dy}{dx}-2x\sec\left(y\right)=0$
$\int_1^{x^2}e^{t^2}dt$
$12x^3+107x^2+32x-448$
$-1076-860$
$9y^2\:-\:30y^2$
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