$y'=y^4$

$\lim\:_{x\to\:\frac{5\pi\:}{4}}\left(\frac{\left(cot\:x-1\right)}{\left(sin\:x\:-\:cos\:x\right)}\right)$

$\frac{1-\sin^4\left(x\right)}{\cos^2\left(x\right)}=1+\sin^2\left(x\right)$

$-\log\left(x\right)=1.67$

$8\tan\left(x\right)\sin\left(x\right)=-\sin\left(x\right)$

$\left(\frac{x^{4}y^{2}}{16z^{6}}\right)^{\frac{3}{2}}$

$5-\left(-10\right)+-3$