$\left(9x^2-4\right)\left(9x^2+4\right)$
$-4+\left(-3\right)-\left(-1\right)$
$\frac{5}{x+3}=\frac{4}{x-2}$
$\int\frac{1}{2\sqrt{\left(x\right)}\sqrt{1-x}}dx$
$\int e^{-x}\cos\left(6x\right)dx$
$w\sin^2\left(0\right)+\cos^2\left(0\right)$
$k^4-6k^2-16$
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