$\left(1-\sin\left(x\right)\right)\left(1+\sin\left(x\right)\right)\left(1+tan^2\left(x\right)\right)$
$12^2b+5^2n$
$\lim_{x\to\infty}\left(5x-lnx\right)$
$1-20+1-198$
$2+8-1$
$\frac{-18d^2-6d}{3d}$
$2\left(-2\right)^3+5\left(2\right)^2-3$
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