$\int sin^5\left(ax+b\right)cos\left(ax+b\right)dx$

$\int\left(x\cdot\cos\left(3x^2+1\right)\right)dx$

$\int\cos^2\left(1-3x\right)dx$

$\left(7m^2n+3c^3\right)\left(7m^2n-3c^3\right)$

$\frac{1-sen\left(x\right)}{\cos\left(x\right)}=cos\:\left(x\right)$

$\cot\left(a\right)=\frac{1}{\tan\left(a\right)}$

$-\frac{160}{80}$