$-\frac{\csc\left(x\right)}{\sin\left(x\right)}+\frac{\cot\left(x\right)}{\tan\left(x\right)}=-1$

$\frac{d}{dx}\sqrt{\frac{x-5}{x^4+3}}$

$\int x\sin\left(\frac{1}{7}x\right)dx$

$\int\frac{x+9}{x^2+6x}dx$

$\int\frac{ln\left(3x^4\right)}{4x^5}dx$

$1+-2+3+-4+-5$

$5\cdot\left(10+3\cdot3+48+6-7\right)$