$\frac{x^2}{4}-\frac{xy}{3}x+\frac{y^2}{9}$
$5^{9-\left(3\right)^2}$
$\frac{dy}{dx}=\frac{1}{2y}\cdot$
$\frac{2x}{x-2}-\frac{x+5}{x+3}$
$\left(\frac{11x^2+795}{\left(x^2+81\right)\left(x^2+49\right)}\right)$
$98^2-4$
$3\cos\left(x\right)+3=\sin\left(x\right)^2$
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