$\int sin^4\left(x\right)cos^5\left(x\right)tan\left(x\right)cot^2\left(x\right)dx$

$7^3+x^2-7x^3-8x+12$

$\frac{\frac{1-\cos\left(x\right)\cos\left(x\right)}{\cos\left(x\right)}}{\tan\left(x\right)}$

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

$\left(-9x+4y\right)\left(-9x-12y\right)$

$\int\frac{1}{\left(x^3-x^2\right)}dx$

$\int\frac{4sec\left(\sqrt{x}\right)}{\sqrt{x}}dx$