$\left(1+\cos^2\left(x\right)\right)\left(1-\sin^2\left(x\right)\right)$
$y=2x^2-4x-6;\:x=0$
$-2.3\:\cdot6.8$
$\int\left(\frac{e^x}{e^{2x}-6e^x+13}\right)dx$
$0\left(-3\right)\cdot\left(-2\right)$
$\cos^2\left(x\right)=1+\cos\left(2x\right)\frac{1}{2}$
$\left(2x^3-3\right)\left(3x^3-3\right)$
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