Solve $x + y + t \le 10$
87345
How many ways so that $x+y+z\leq n$?
45555
$(x+y)^c\le x^c+y^c$ for $0<c\le1$
138931
Show that $||x+y||\cdot||x-y||\le||x||^2+||y||^2$
44744
Integer solutions of $xy+9(x+y)=2006$
74532
Solve for $ A $ from $ A {A}^{T} $
85917
Solve $(x+1)^y-x^z=1$
5765
Show that $[2x]+[2y] \geq [x]+[y]+[x+y]$
79040
Graph of $|x| + |y| = 1$
139474
Solving system of Congruences with Two Variables (x and y)
79241
Solve $10^x+11^x+12^x = 13^x+14^x$
7775
Show that $|x-y|\leq |x|+|y|$.
23603
Joint distribution of $X+Y$ and $\frac{X}{X+Y}$
158938
Using DSolve to solve for x[t,parameter]
12102
particular solution to $y^{(4)} -2y'' +y = xe^x $ using undetermined coefficients
15753
Solve the following equation in positive integers $x$ and $y$
83496
Math contest integer triplet problem: $x + y + z + xy + yz + xz = xyz − 1$
43476
An exponential equation over positive real numbers $4^x+14^x+3^x=11^x+10^x$