$\int\frac{2}{4u^2-1}du$
$2\sin\left(x-20\right)=1$
$\frac{m^4-1^4}{m-1}$
$x^2+2\left(x^2-1\right)$
$\left(9b^2+d\right)^3$
$\left(2x^m+2y\right)\left(2x^m-2y\right)$
$\left(3-2x+2x^2\right)-\left(4x-5+3x^2\right)$
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