$\left(4-7\right)^2+2.8+9-\left(32:8-6\right)^3+\left(-2-8\right)$

$100x^{2}-49v^{2}$

$\frac{dy}{dx}=\frac{x-1}{yx^2\cos\left(y\right)}$

$-\left(-75-15\right)-\left(-200-380\right)-\left(420-150\right)$

$\left(-17\right)+\left(-18\right)-\left(-54\right)-21$

$2y^3\cdot5y\cdot4y^7$

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