diff --git a/parser.c b/parser.c
index 446b93e..a6dfbe9 100644
--- a/parser.c
+++ b/parser.c
@@ -91,14 +91,33 @@ instance *inewinstance(void)
 
 void idelinstance(instance *it)
 {
+	for (uint32_t i = 0; i < MAX_LINES; i++) {// TODO free vars!
+		if (it->lines[i] == 0)
+			continue;
+		for (int j = 0; j < 32; j++) {
+			variable *v = it->lines[i][j];
+			if (v != 0) {
+				if (((uint32_t)v & OP_MAGIC) == OP_MAGIC)
+					continue;
+
+				if (v->type == FUNC || v->type == CFUNC)
+					j++; // argcount
+
+				if (v->tmp == 1)
+					itryfree(v);
+			}
+ 		}
+
+		free(it->lines[i]);
+	}
+	free(it->lines);
+
 	free(it->vars);
 	for (uint32_t i = 0; i < MAX_VARS; i++)
 		free(it->names[i]);
 	free(it->names);
+
 	free(it->stack);
-	for (uint32_t i = 0; i < MAX_LINES; i++) // TODO free vars!
-		free(it->lines[i]);
-	free(it->lines);
 	itryfree(it->ret);
 	free(it);
 }
@@ -251,9 +270,27 @@ loop:
 		itryfree(it->ret);
 	it->ret = 0;
 
-	variable **copy = malloc(32 * sizeof(variable *));
-	for (int i = 0; i < 32; i++)
-		copy[i] = it->lines[it->lnidx][i];
+	variable **copy = (variable **)malloc(32 * sizeof(variable *));
+	for (int i = 0; i < 32; i++) {
+		variable *v = it->lines[it->lnidx][i];
+		if (v != 0) {
+			if (((uint32_t)v & OP_MAGIC) == OP_MAGIC) {
+				copy[i] = v;
+				continue;
+			}
+
+			if (v->tmp == 1)
+				copy[i] = varclone(v);
+			else
+				copy[i] = v;
+			if (v->type == FUNC || v->type == CFUNC) {
+				i++;
+				copy[i] = it->lines[it->lnidx][i]; // argcount
+			}
+		} else {
+			copy[i] = 0;
+		}
+	}
 	it->ret = isolve(it, copy, 0);
 	free(copy);
 
@@ -340,7 +377,7 @@ variable *isolve_(instance *it, variable **ops, uint32_t count)
 
 			ops[start + 1] = 0;
 			for (uint32_t j = start + 2; j < i; j++) {
-				//itryfree(ops[j]);
+				itryfree(ops[j]);
 				ops[j] = 0;
 			}
 		}
@@ -368,24 +405,30 @@ variable *isolve_(instance *it, variable **ops, uint32_t count)
 				if (bidx == count)
 					return 0;
 
-				if (it->sindent & SKIP) {
-					//itryfree(ops[aidx]);
-					//itryfree(ops[bidx]);
-					ops[aidx] = 0;
-				} else {
-					variable *v = varclone(ops[aidx]);
+				if (!(it->sindent & SKIP)) {
+					variable *v = !ops[aidx]->tmp ? varclone(ops[aidx]) : ops[aidx];
 					if (func(v, ops[aidx], ops[bidx]) != 0)
 						return 0;
-					//itryfree(ops[aidx]);
 					ops[aidx] = v;
-					//itryfree(ops[bidx]);
+				} else {
+					itryfree(ops[aidx]);
+					ops[aidx] = 0;
 				}
-				ops[i] = 0;
+				itryfree(ops[bidx]);
 				ops[bidx] = 0;
+				ops[i] = 0;
 			}
 		}
 	}
 
+	// implicit multiply
+	/*if (ops[0] != 0 && ops[0]->type == NUMBER) {
+		for (uint32_t i = 1; i < count; i++) {
+			if (ops[i] != 0 && ops[i]->type == NUMBER)
+				ops[0]->value.f *= ops[i]->value.f;
+		}
+	}*/
+
 	return ops[0];
 }
 
@@ -446,7 +489,7 @@ variable **iparse(instance *it, const char *s)
 				ops[ooffset++] = (variable *)1;
 			}
 			offset = end;
-		} else if (isdigit(s[offset])) {
+		} else if (isdigit(s[offset])) {// || (s[offset] == '-' && isdigit(s[offset + 1]))) {
 			size_t end = offset + 1;
 			while (isdigit(s[end]) || s[end] == '.')
 				end++;
diff --git a/shell.c b/shell.c
deleted file mode 100644
index ade66b9..0000000
--- a/shell.c
+++ /dev/null
@@ -1,52 +0,0 @@
-#include <stdio.h>
-#include <string.h>
-
-#include "parser.h"
-
-int print(instance *it)
-{
-	variable *s = igetarg(it, 0);
-	if (s->type == NUMBER) {
-		if (s->value.f == (int)s->value.f)
-			printf("%d\n", (int)s->value.f);
-		else
-			printf("%.3f\n", s->value.f);
-	} else if (s->value.p != 0) {
-		printf("%s\n", (char *)s->value.p);
-	}
-	return 0;
-}
-
-int main(int argc, char **argv)
-{
-	if (argc != 2) {
-		printf("Usage: %s file\n", argv[0]);
-		return -1;
-	}
-
-	FILE *fp = fopen(argv[1], "r");
-	if (fp == 0) {
-		printf("Could not open file: %s\n", argv[1]);
-		return -1;
-	}
-
-	instance *it = inewinstance();
-	inew_cfunc(it, "print", print);
-
-	char *line = 0;
-	size_t size;
-	int result;
-	while (getline(&line, &size, fp) != -1) {
-		*strchr(line, '\n') = '\0';
-		result = idoline(it, line);
-		if (result != 0)
-			printf("Error: %d\n", result);
-		//if (it->ret != 0)
-		//	printf("%s = %f\n", line, it->ret->value.f);
-	}
-
-	fclose(fp);
-	idelinstance(it);
-	return 0;
-}
-
diff --git a/test1 b/test1
index 1d8588c..cc04423 100644
--- a/test1
+++ b/test1
@@ -3,11 +3,16 @@
 # looking for proper basic function, respect for order of ops,
 # and respect for parentheses
 
-2 + 5
-14 - 9
-3 * 8 + 3
-9 - 3 / 2
-3 * (8 + 3)
-(9 - 3) / 2
-(4 + 5) * ((9 - 1) + 3)
-5 - 3 + 4
+print(2 + 5)
+print(14 - 9)
+print(3 * 8 + 3)
+print(9 - 3 / 2)
+print(3 * (8 + 3))
+print((9 - 3) / 2)
+print((4 + 5) * ((9 - 1) + 3))
+print(5 - 3 + 4)
+print("")
+print(-4)
+print(-4 + -3)
+print(-8+13)
+print(4- -9)
diff --git a/test3 b/test3
index 940ed6f..3c727fa 100644
--- a/test3
+++ b/test3
@@ -18,7 +18,7 @@ a = a + 1
 checka
 
 d = 0
-while (d < 10) {
+while (d < 20) {
 	print(d)
 	d = d + 1
 }
diff --git a/test4 b/test4
index af8595e..98731da 100644
--- a/test4
+++ b/test4
@@ -4,3 +4,7 @@
 x = 4
 y = solve("x-2")
 print(y)
+print("")
+
+y = solve("3*x")
+print(y)