$sin\left(x-30\right)=-0.3$

$\left(-9+-2\right)\cdot4$

$8^7-8^7$

$\frac{9^x}{3^x}$

$\lim_{x\to1}\left(\frac{x^2+10x-11}{\ln\left(x\right)}\right)$

$\frac{\left(\cos\left(x\right)+\sin\left(x\right)\right)^2}{\sin\left(x\right)}=\csc\left(x\right)+2\cos\left(x\right)$

$\lim n\to\infty\left(\left(1+\frac{1}{2n}\right)^{n^2}\right)$