$36x^2-16b^2$

$sin\left(a+45\right)=\frac{1}{\sqrt{2}}\left(sina+cosa\right)$

$\left(-880\right)-\left(-100\right)$

$\int x^{-4}lnxdx$

$\frac{\tan\left(a\right)}{\tan\left(a\right)-\tan\left(b\right)}-\frac{\cot\left(a\right)}{\cot\left(a\right)-\cot\left(b\right)}$

$f\left(x\right)=\left(x^2+2x\right)\left(-8x^3-5x\right)$

$\:\frac{1\:+\:cos^2\left(30\right)}{sin^2\left(30\right)}=2csc^2\left(30\right)-1$