$xy^{'\:}-\:2y=\frac{x^3}{sin^2\:\left(x\right)\:\sqrt[4]{cot\left(x\right)}}$

$\int\:\frac{7x^2+14x+9}{x^3+x^2}dx$

$\frac{x}{55}=0.\left(a+1\right)\left(a+2\right)$

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

$\left(2m+y\right)^5$

$\int\text{sen}^6a\cos a\text{d}a$

$-9x-6x-2x$