$3a^2b=75$

$\frac{dy}{dx}-3y=2x^4$

$24\:\frac{1}{2}+16.15\:\:-4$

$2\left(x+1\right)<x+6$

$x^2-2x+24$

$\frac{1+\sin\left(x\right)^2}{\cos\left(x\right)^2}=2\sec\left(x\right)-1$

$\:sinh\left(x+y\right)=sinh\left(x\right)cosh\left(y\right)+cosh\left(x\right)sinh\left(y\right)$