$\int_{\frac{\pi}{4}}^{\frac{3\pi}{4}}\left(-a^2\cos\left(2x\right)\right)dx$

$9x-5y=9$

$\left(xy-x\right)dx+dy=0$

$5.6\sqrt[2]{6}+0.08\sqrt[4]{6}+5.25\sqrt[4]{6}$

$\frac{1-\sin^4\left(x\right)}{\cos^2\left(x\right)}=\cos^2\left(x\right)$

$\int\frac{1}{5+x^2}dx$

$8a^2-16a-90$