$-\left(-9\right)\left(-4\right)\left(+10\right)\left(+5\right)\left(-2\right)$

$\int\frac{2t^2-8t-8}{\left(t-2\right)\left(t^2-4\right)}dt$

$sin^4x-cos^4x+2sin^2-1$

$\int\frac{25}{2}\tan^4\left(x\right)sec\left(x\right)dx$

$\frac{\left(2x-3\right)}{4x+3}=\frac{1}{5}$

$a^3-b^1$

$\lim_{x\to3}\left(\frac{4x}{9ln\left(1+2e^x\right)}\right)$