$\lim_{x\to0}\left(\frac{x^2exp\left(x\right)}{\left(exp\left(x\right)-1\right)^2}\right)$

$t\left(\frac{du}{dt}\right)-3u=t^2$

$05+025-02\infty$

$10x^6+2y^4\cdot\left(2x^3-y^2\right)$

$sin\left(x-y\right)=1-cot\left(x\right)tan\left(b\right)$

$\left(3x-2\right)^2=9x^2-6x+4$

$\int\left(4r+9\right)^{\frac{1}{2}}2dr$