$\lim_{x\to\infty}\left(\frac{2x^3+3x-2}{4x^2+2x-3}\right)$
$\sin\left(x+270\right)=-\cos\left(x\right)$
$3-3x^2y^2$
$\left(a^n-4\right)\left(a^n+4\right)$
$\frac{dy}{dx}=y^4-6y^3-16y^2$
$35y^3-90y^2-45y$
$3y-y+5y$
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