$7x+30\ge-40$

$-74-90-7$

$\int_0^{20}x^3\sin\left(x\right)dx$

$\left(\frac{10}{7}\right)^{\infty}$

$\frac{\infty^4+3\left(\infty\right)^7-\infty-2}{4\left(\infty\right)-\infty^6-5\left(\infty\right)^2-9\left(\infty\right)^7}$

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

$2x^m\sqrt{a^{-3}}\cdot x^m\sqrt{\frac{1}{a^3}}$