$1000x^6-343$
$\frac{x^3+x-1}{x^2+3}$
$\frac{dy}{dx}=e^{\left(t+x\right)}$
$\left(15x^2+14y^2\right)^2$
$\frac{1}{sec\left(-y\right)tan\:y}=\:cscy\:-\:sin\:y$
$\left(7x-y\right)\left(7x+y\right)$
$x^3+y^3=126$
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