$\lim_{x\to\frac{\pi}{2}}\left(\frac{\sin\left(x\right)-\cos\left(x\right)}{x-\frac{\pi}{4}}\right)$

$\left(-15\right)\left(-24\right)$

$\int\frac{1}{x^{2}\sqrt{1+x^{2}}}dx$

$\int\left(-4x+3\right)^6dx$

$\left(r+s\right)dr+rds=0$

$\int_0^2\left(x^2ln\left(6x\right)\right)dx$

$\left(5s^2+\frac{1}{2}\right)\left(5s^2-\frac{3}{5}\right)$