$\int\left(\frac{sin\left(2t+20\right)}{cos^2\left(2t+20\right)}\right)dt$
$8-9-1+12-1$
$\left(z+1\right)^4$
$m^2+7n-8c+d\:-\:m^2-9n+11c+14$
$\left(9^{-n}\cdot9\right)^3$
$0.2\:+\:2\:+\:ab\:-0.2a$
$\left(\frac{3}{2}x^2-1\right)\left(\frac{3}{2}x^2+1\right)$
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